402591473 has 4 divisors (see below), whose sum is σ = 402678900. Its totient is φ = 402504048.

The previous prime is 402591463. The next prime is 402591479. The reversal of 402591473 is 374195204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 235070224 + 167521249 = 15332^2 + 12943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402591473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402591479) 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, 36398 + ... + 46151.

It is an arithmetic number, because the mean of its divisors is an integer number (100669725).

Almost surely, 2^402591473 is an apocalyptic number.

It is an amenable number.

402591473 is a deficient number, since it is larger than the sum of its proper divisors (87427).

402591473 is an equidigital number, since it uses as much as digits as its factorization.

402591473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87426.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 402591473 is about 20064.6822302273. The cubic root of 402591473 is about 738.3940538238.

The spelling of 402591473 in words is "four hundred two million, five hundred ninety-one thousand, four hundred seventy-three".