813173431 has 8 divisors (see below), whose sum is σ = 959320064. Its totient is φ = 674521560.

The previous prime is 813173411. The next prime is 813173467. The reversal of 813173431 is 134371318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 813173431 - 2¹³ = 813165239 is a prime.

It is a super-2 number, since 2×813173431² = 1322502057768623522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 813173393 and 813173402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813173411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1873455 + ... + 1873888.

It is an arithmetic number, because the mean of its divisors is an integer number (119915008).

Almost surely, 2^813173431 is an apocalyptic number.

813173431 is a deficient number, since it is larger than the sum of its proper divisors (146146633).

813173431 is a wasteful number, since it uses less digits than its factorization.

813173431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3747381.

The product of its digits is 6048, while the sum is 31.

The square root of 813173431 is about 28516.1959419555. The cubic root of 813173431 is about 933.3855219825.

It can be divided in two parts, 813173 and 431, that added together give a square (813604 = 902²).

The spelling of 813173431 in words is "eight hundred thirteen million, one hundred seventy-three thousand, four hundred thirty-one".