402172853 has 2 divisors, whose sum is σ = 402172854. Its totient is φ = 402172852.

The previous prime is 402172789. The next prime is 402172861. The reversal of 402172853 is 358271204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299393809 + 102779044 = 17303^2 + 10138^2 .

It is a cyclic number.

It is not a de Polignac number, because 402172853 - 2⁶ = 402172789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402172153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201086426 + 201086427.

It is an arithmetic number, because the mean of its divisors is an integer number (201086427).

Almost surely, 2^402172853 is an apocalyptic number.

It is an amenable number.

402172853 is a deficient number, since it is larger than the sum of its proper divisors (1).

402172853 is an equidigital number, since it uses as much as digits as its factorization.

402172853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 402172853 is about 20054.2477545282. The cubic root of 402172853 is about 738.1380343937.

The spelling of 402172853 in words is "four hundred two million, one hundred seventy-two thousand, eight hundred fifty-three".