401690953 has 2 divisors, whose sum is σ = 401690954. Its totient is φ = 401690952.

The previous prime is 401690911. The next prime is 401690969. The reversal of 401690953 is 359096104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299013264 + 102677689 = 17292^2 + 10133^2 .

It is a cyclic number.

It is not a de Polignac number, because 401690953 - 2¹³ = 401682761 is a prime.

It is a super-2 number, since 2×401690953² = 322711243444096418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401690053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200845476 + 200845477.

It is an arithmetic number, because the mean of its divisors is an integer number (200845477).

Almost surely, 2^401690953 is an apocalyptic number.

It is an amenable number.

401690953 is a deficient number, since it is larger than the sum of its proper divisors (1).

401690953 is an equidigital number, since it uses as much as digits as its factorization.

401690953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 401690953 is about 20042.2292422774. The cubic root of 401690953 is about 737.8430941413.

The spelling of 401690953 in words is "four hundred one million, six hundred ninety thousand, nine hundred fifty-three".