213699539 has 2 divisors, whose sum is σ = 213699540. Its totient is φ = 213699538.

The previous prime is 213699511. The next prime is 213699557. The reversal of 213699539 is 935996312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213699539 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213699493 and 213699502.

It is not a weakly prime, because it can be changed into another prime (213699569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106849769 + 106849770.

It is an arithmetic number, because the mean of its divisors is an integer number (106849770).

Almost surely, 2^213699539 is an apocalyptic number.

213699539 is a deficient number, since it is larger than the sum of its proper divisors (1).

213699539 is an equidigital number, since it uses as much as digits as its factorization.

213699539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 393660, while the sum is 47.

The square root of 213699539 is about 14618.4656855636. The cubic root of 213699539 is about 597.8623365549.

The spelling of 213699539 in words is "two hundred thirteen million, six hundred ninety-nine thousand, five hundred thirty-nine".