725558437 has 4 divisors (see below), whose sum is σ = 757104480. Its totient is φ = 694012396.

The previous prime is 725558429. The next prime is 725558497. The reversal of 725558437 is 734855527.

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.

It is not a de Polignac number, because 725558437 - 2³ = 725558429 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 (725558497) 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, 15772987 + ... + 15773032.

It is an arithmetic number, because the mean of its divisors is an integer number (189276120).

Almost surely, 2^725558437 is an apocalyptic number.

It is an amenable number.

725558437 is a deficient number, since it is larger than the sum of its proper divisors (31546043).

725558437 is a wasteful number, since it uses less digits than its factorization.

725558437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31546042.

The product of its digits is 1176000, while the sum is 46.

The square root of 725558437 is about 26936.1919543205. The cubic root of 725558437 is about 898.5814843417.

The spelling of 725558437 in words is "seven hundred twenty-five million, five hundred fifty-eight thousand, four hundred thirty-seven".