400907390869 has 2 divisors, whose sum is σ = 400907390870. Its totient is φ = 400907390868.

The previous prime is 400907390833. The next prime is 400907390887. The reversal of 400907390869 is 968093709004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 387811335025 + 13096055844 = 622745^2 + 114438^2 .

It is a cyclic number.

It is not a de Polignac number, because 400907390869 - 2²⁹ = 400370519957 is a prime.

It is a super-2 number, since 2×400907390869² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400907390269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200453695434 + 200453695435.

It is an arithmetic number, because the mean of its divisors is an integer number (200453695435).

Almost surely, 2^400907390869 is an apocalyptic number.

It is an amenable number.

400907390869 is a deficient number, since it is larger than the sum of its proper divisors (1).

400907390869 is an equidigital number, since it uses as much as digits as its factorization.

400907390869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 400907390869 in words is "four hundred billion, nine hundred seven million, three hundred ninety thousand, eight hundred sixty-nine".