213397507 has 2 divisors, whose sum is σ = 213397508. Its totient is φ = 213397506.

The previous prime is 213397489. The next prime is 213397511. The reversal of 213397507 is 705793312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213397507 - 2¹¹ = 213395459 is a prime.

It is not a weakly prime, because it can be changed into another prime (213397517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106698753 + 106698754.

It is an arithmetic number, because the mean of its divisors is an integer number (106698754).

Almost surely, 2^213397507 is an apocalyptic number.

213397507 is a deficient number, since it is larger than the sum of its proper divisors (1).

213397507 is an equidigital number, since it uses as much as digits as its factorization.

213397507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 37.

The square root of 213397507 is about 14608.1315369215. The cubic root of 213397507 is about 597.5805410706.

The spelling of 213397507 in words is "two hundred thirteen million, three hundred ninety-seven thousand, five hundred seven".