723951131 has 4 divisors (see below), whose sum is σ = 725631264. Its totient is φ = 722271000.

The previous prime is 723951121. The next prime is 723951191. The reversal of 723951131 is 131159327.

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 723951131 - 2¹⁴ = 723934747 is a prime.

It is a super-2 number, since 2×723951131² = 1048210480152358322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723951101) 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, 839420 + ... + 840281.

It is an arithmetic number, because the mean of its divisors is an integer number (181407816).

Almost surely, 2^723951131 is an apocalyptic number.

723951131 is a deficient number, since it is larger than the sum of its proper divisors (1680133).

723951131 is a wasteful number, since it uses less digits than its factorization.

723951131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680132.

The product of its digits is 5670, while the sum is 32.

The square root of 723951131 is about 26906.3399777822. The cubic root of 723951131 is about 897.9174609944.

The spelling of 723951131 in words is "seven hundred twenty-three million, nine hundred fifty-one thousand, one hundred thirty-one".