402979165 has 4 divisors (see below), whose sum is σ = 483575004. Its totient is φ = 322383328.

The previous prime is 402979147. The next prime is 402979177. The reversal of 402979165 is 561979204.

It is a happy number.

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 147331044 + 255648121 = 12138^2 + 15989^2 .

It is a cyclic number.

It is not a de Polignac number, because 402979165 - 2⁵ = 402979133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40297912 + ... + 40297921.

It is an arithmetic number, because the mean of its divisors is an integer number (120893751).

Almost surely, 2^402979165 is an apocalyptic number.

It is an amenable number.

402979165 is a deficient number, since it is larger than the sum of its proper divisors (80595839).

402979165 is an equidigital number, since it uses as much as digits as its factorization.

402979165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80595838.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 402979165 is about 20074.3409605397. The cubic root of 402979165 is about 738.6310000784.

The spelling of 402979165 in words is "four hundred two million, nine hundred seventy-nine thousand, one hundred sixty-five".