402978151 has 2 divisors, whose sum is σ = 402978152. Its totient is φ = 402978150.

The previous prime is 402978119. The next prime is 402978209. The reversal of 402978151 is 151879204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402978151 - 2⁵ = 402978119 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402978151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402678151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201489075 + 201489076.

It is an arithmetic number, because the mean of its divisors is an integer number (201489076).

Almost surely, 2^402978151 is an apocalyptic number.

402978151 is a deficient number, since it is larger than the sum of its proper divisors (1).

402978151 is an equidigital number, since it uses as much as digits as its factorization.

402978151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 402978151 is about 20074.3157044020. The cubic root of 402978151 is about 738.6303805489.

The spelling of 402978151 in words is "four hundred two million, nine hundred seventy-eight thousand, one hundred fifty-one".