402489713 has 4 divisors (see below), whose sum is σ = 404247540. Its totient is φ = 400731888.

The previous prime is 402489707. The next prime is 402489751. The reversal of 402489713 is 317984204.

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 228856384 + 173633329 = 15128^2 + 13177^2 .

It is a cyclic number.

It is not a de Polignac number, because 402489713 - 2¹⁰ = 402488689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402489793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878570 + ... + 879027.

It is an arithmetic number, because the mean of its divisors is an integer number (101061885).

Almost surely, 2^402489713 is an apocalyptic number.

It is an amenable number.

402489713 is a deficient number, since it is larger than the sum of its proper divisors (1757827).

402489713 is a wasteful number, since it uses less digits than its factorization.

402489713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757826.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 402489713 is about 20062.1462710249. The cubic root of 402489713 is about 738.3318358223.

The spelling of 402489713 in words is "four hundred two million, four hundred eighty-nine thousand, seven hundred thirteen".