403131397 has 8 divisors (see below), whose sum is σ = 410382720. Its totient is φ = 395923920.

The previous prime is 403131383. The next prime is 403131413. The reversal of 403131397 is 793131304.

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

It is a cyclic number.

It is not a de Polignac number, because 403131397 - 2⁷ = 403131269 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 (403131307) 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, 7879 + ... + 29467.

It is an arithmetic number, because the mean of its divisors is an integer number (51297840).

Almost surely, 2^403131397 is an apocalyptic number.

It is an amenable number.

403131397 is a deficient number, since it is larger than the sum of its proper divisors (7251323).

403131397 is a wasteful number, since it uses less digits than its factorization.

403131397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21923.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 403131397 is about 20078.1323085590. The cubic root of 403131397 is about 738.7239983672.

The spelling of 403131397 in words is "four hundred three million, one hundred thirty-one thousand, three hundred ninety-seven".