400950887 has 2 divisors, whose sum is σ = 400950888. Its totient is φ = 400950886.

The previous prime is 400950859. The next prime is 400950889. The reversal of 400950887 is 788059004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400950887 - 2¹⁴ = 400934503 is a prime.

It is a super-2 number, since 2×400950887² = 321523227572173538, which contains 22 as substring.

Together with 400950889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400950889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200475443 + 200475444.

It is an arithmetic number, because the mean of its divisors is an integer number (200475444).

Almost surely, 2^400950887 is an apocalyptic number.

400950887 is a deficient number, since it is larger than the sum of its proper divisors (1).

400950887 is an equidigital number, since it uses as much as digits as its factorization.

400950887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 400950887 is about 20023.7580638600. The cubic root of 400950887 is about 737.3896873022.

The spelling of 400950887 in words is "four hundred million, nine hundred fifty thousand, eight hundred eighty-seven".