407213887 has 2 divisors, whose sum is σ = 407213888. Its totient is φ = 407213886.

The previous prime is 407213881. The next prime is 407213987. The reversal of 407213887 is 788312704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 407213887 - 2³ = 407213879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (407213881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203606943 + 203606944.

It is an arithmetic number, because the mean of its divisors is an integer number (203606944).

Almost surely, 2^407213887 is an apocalyptic number.

407213887 is a deficient number, since it is larger than the sum of its proper divisors (1).

407213887 is an equidigital number, since it uses as much as digits as its factorization.

407213887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 407213887 is about 20179.5412980573. The cubic root of 407213887 is about 741.2093003938.

The spelling of 407213887 in words is "four hundred seven million, two hundred thirteen thousand, eight hundred eighty-seven".