743447631 has 4 divisors (see below), whose sum is σ = 991263512. Its totient is φ = 495631752.

The previous prime is 743447557. The next prime is 743447641. The reversal of 743447631 is 136744347.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136744347 = 3 ⋅45581449.

It is not a de Polignac number, because 743447631 - 2⁷ = 743447503 is a prime.

It is a super-2 number, since 2×743447631² = 1105428760079024322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 743447631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743447641) 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, 123907936 + ... + 123907941.

It is an arithmetic number, because the mean of its divisors is an integer number (247815878).

Almost surely, 2^743447631 is an apocalyptic number.

743447631 is a deficient number, since it is larger than the sum of its proper divisors (247815881).

743447631 is a wasteful number, since it uses less digits than its factorization.

743447631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247815880.

The product of its digits is 169344, while the sum is 39.

The square root of 743447631 is about 27266.2360988824. The cubic root of 743447631 is about 905.9066769851.

The spelling of 743447631 in words is "seven hundred forty-three million, four hundred forty-seven thousand, six hundred thirty-one".