743485661 has 4 divisors (see below), whose sum is σ = 743695392. Its totient is φ = 743275932.

The previous prime is 743485651. The next prime is 743485663. The reversal of 743485661 is 166584347.

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 an emirpimes, since its reverse is a distinct semiprime: 166584347 = 1049 ⋅158803.

It is a cyclic number.

It is not a de Polignac number, because 743485661 - 2⁶ = 743485597 is a prime.

It is a super-2 number, since 2×743485661² = 1105541856225213842, 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 (743485663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99455 + ... + 106668.

It is an arithmetic number, because the mean of its divisors is an integer number (185923848).

Almost surely, 2^743485661 is an apocalyptic number.

It is an amenable number.

743485661 is a deficient number, since it is larger than the sum of its proper divisors (209731).

743485661 is a wasteful number, since it uses less digits than its factorization.

743485661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209730.

The product of its digits is 483840, while the sum is 44.

The square root of 743485661 is about 27266.9334726148. The cubic root of 743485661 is about 905.9221235084.

The spelling of 743485661 in words is "seven hundred forty-three million, four hundred eighty-five thousand, six hundred sixty-one".