743431257 has 32 divisors (see below), whose sum is σ = 1132095360. Its totient is φ = 481904640.

The previous prime is 743431219. The next prime is 743431261. The reversal of 743431257 is 752134347.

It is not a de Polignac number, because 743431257 - 2⁶ = 743431193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (743431357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278473 + ... + 281129.

It is an arithmetic number, because the mean of its divisors is an integer number (35377980).

Almost surely, 2^743431257 is an apocalyptic number.

It is an amenable number.

743431257 is a deficient number, since it is larger than the sum of its proper divisors (388664103).

743431257 is a wasteful number, since it uses less digits than its factorization.

743431257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950 (or 2944 counting only the distinct ones).

The product of its digits is 70560, while the sum is 36.

The square root of 743431257 is about 27265.9358357640. The cubic root of 743431257 is about 905.9000262477.

The spelling of 743431257 in words is "seven hundred forty-three million, four hundred thirty-one thousand, two hundred fifty-seven".