402163973 has 2 divisors, whose sum is σ = 402163974. Its totient is φ = 402163972.

The previous prime is 402163903. The next prime is 402163981. The reversal of 402163973 is 379361204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372374209 + 29789764 = 19297^2 + 5458^2 .

It is a cyclic number.

It is not a de Polignac number, because 402163973 - 2²⁶ = 335055109 is a prime.

It is a super-2 number, since 2×402163973² = 323471722358289458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402163903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201081986 + 201081987.

It is an arithmetic number, because the mean of its divisors is an integer number (201081987).

Almost surely, 2^402163973 is an apocalyptic number.

It is an amenable number.

402163973 is a deficient number, since it is larger than the sum of its proper divisors (1).

402163973 is an equidigital number, since it uses as much as digits as its factorization.

402163973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 402163973 is about 20054.0263538273. The cubic root of 402163973 is about 738.1326016434.

The spelling of 402163973 in words is "four hundred two million, one hundred sixty-three thousand, nine hundred seventy-three".