740721869 has 4 divisors (see below), whose sum is σ = 744860160. Its totient is φ = 736583580.

The previous prime is 740721853. The next prime is 740721871. The reversal of 740721869 is 968127047.

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.

It is a cyclic number.

It is not a de Polignac number, because 740721869 - 2⁴ = 740721853 is a prime.

It is a super-2 number, since 2×740721869² = 1097337774429706322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740721809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068877 + ... + 2069234.

It is an arithmetic number, because the mean of its divisors is an integer number (186215040).

Almost surely, 2^740721869 is an apocalyptic number.

It is an amenable number.

740721869 is a deficient number, since it is larger than the sum of its proper divisors (4138291).

740721869 is a wasteful number, since it uses less digits than its factorization.

740721869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138290.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 740721869 is about 27216.2059993674. The cubic root of 740721869 is about 904.7981882652.

The spelling of 740721869 in words is "seven hundred forty million, seven hundred twenty-one thousand, eight hundred sixty-nine".