213772907 has 2 divisors, whose sum is σ = 213772908. Its totient is φ = 213772906.

The previous prime is 213772883. The next prime is 213772919. The reversal of 213772907 is 709277312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213772907 - 2¹² = 213768811 is a prime.

It is not a weakly prime, because it can be changed into another prime (213772957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106886453 + 106886454.

It is an arithmetic number, because the mean of its divisors is an integer number (106886454).

Almost surely, 2^213772907 is an apocalyptic number.

213772907 is a deficient number, since it is larger than the sum of its proper divisors (1).

213772907 is an equidigital number, since it uses as much as digits as its factorization.

213772907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 213772907 is about 14620.9748990962. The cubic root of 213772907 is about 597.9307487209.

The spelling of 213772907 in words is "two hundred thirteen million, seven hundred seventy-two thousand, nine hundred seven".