213385739 has 6 divisors (see below), whose sum is σ = 248224284. Its totient is φ = 182902020.

The previous prime is 213385729. The next prime is 213385759. The reversal of 213385739 is 937583312.

It is not a de Polignac number, because 213385739 - 2⁸ = 213385483 is a prime.

It is a super-2 number, since 2×213385739² = 91066947217152242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213385696 and 213385705.

It is not an unprimeable number, because it can be changed into a prime (213385729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2177357 + ... + 2177454.

It is an arithmetic number, because the mean of its divisors is an integer number (41370714).

Almost surely, 2^213385739 is an apocalyptic number.

213385739 is a deficient number, since it is larger than the sum of its proper divisors (34838545).

213385739 is an equidigital number, since it uses as much as digits as its factorization.

213385739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354825 (or 4354818 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 213385739 is about 14607.7287420050. The cubic root of 213385739 is about 597.5695561608.

The spelling of 213385739 in words is "two hundred thirteen million, three hundred eighty-five thousand, seven hundred thirty-nine".