397969153 has 2 divisors, whose sum is σ = 397969154. Its totient is φ = 397969152.

The previous prime is 397969141. The next prime is 397969157. The reversal of 397969153 is 351969793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372798864 + 25170289 = 19308^2 + 5017^2 .

It is a cyclic number.

It is not a de Polignac number, because 397969153 - 2¹³ = 397960961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397969153.

It is not a weakly prime, because it can be changed into another prime (397969157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198984576 + 198984577.

It is an arithmetic number, because the mean of its divisors is an integer number (198984577).

Almost surely, 2^397969153 is an apocalyptic number.

It is an amenable number.

397969153 is a deficient number, since it is larger than the sum of its proper divisors (1).

397969153 is an equidigital number, since it uses as much as digits as its factorization.

397969153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1377810, while the sum is 52.

The square root of 397969153 is about 19949.1642180819. The cubic root of 397969153 is about 735.5572327309.

The spelling of 397969153 in words is "three hundred ninety-seven million, nine hundred sixty-nine thousand, one hundred fifty-three".