43491357 has 64 divisors (see below), whose sum is σ = 82001920. Its totient is φ = 22161600.

The previous prime is 43491347. The next prime is 43491373. The reversal of 43491357 is 75319434.

It is not a de Polignac number, because 43491357 - 2⁴ = 43491341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43491347) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 75882 + ... + 76452.

It is an arithmetic number, because the mean of its divisors is an integer number (1281280).

Almost surely, 2^43491357 is an apocalyptic number.

It is an amenable number.

43491357 is a deficient number, since it is larger than the sum of its proper divisors (38510563).

43491357 is a wasteful number, since it uses less digits than its factorization.

43491357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 625 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 43491357 is about 6594.7977224476. The cubic root of 43491357 is about 351.6691887043.

The spelling of 43491357 in words is "forty-three million, four hundred ninety-one thousand, three hundred fifty-seven".