740437591 has 4 divisors (see below), whose sum is σ = 745153912. Its totient is φ = 735721272.

The previous prime is 740437561. The next prime is 740437627. The reversal of 740437591 is 195734047.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 740437591 - 2²⁵ = 706883159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740437501) 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, 2357925 + ... + 2358238.

It is an arithmetic number, because the mean of its divisors is an integer number (186288478).

Almost surely, 2^740437591 is an apocalyptic number.

740437591 is a deficient number, since it is larger than the sum of its proper divisors (4716321).

740437591 is a wasteful number, since it uses less digits than its factorization.

740437591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716320.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 740437591 is about 27210.9829113173. The cubic root of 740437591 is about 904.6824241068.

The spelling of 740437591 in words is "seven hundred forty million, four hundred thirty-seven thousand, five hundred ninety-one".