743970961 has 4 divisors (see below), whose sum is σ = 744049152. Its totient is φ = 743892772.

The previous prime is 743970947. The next prime is 743970967. The reversal of 743970961 is 169079347.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 169079347 = 19 ⋅8898913.

It is a cyclic number.

It is not a de Polignac number, because 743970961 - 2⁷ = 743970833 is a prime.

It is a super-2 number, since 2×743970961² = 1106985581622527042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (743970967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22465 + ... + 44638.

It is an arithmetic number, because the mean of its divisors is an integer number (186012288).

Almost surely, 2^743970961 is an apocalyptic number.

It is an amenable number.

743970961 is a deficient number, since it is larger than the sum of its proper divisors (78191).

743970961 is a wasteful number, since it uses less digits than its factorization.

743970961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78190.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 743970961 is about 27275.8310780808. The cubic root of 743970961 is about 906.1191900232.

It can be divided in two parts, 7439 and 70961, that added together give a square (78400 = 280²).

The spelling of 743970961 in words is "seven hundred forty-three million, nine hundred seventy thousand, nine hundred sixty-one".