213989139 has 24 divisors (see below), whose sum is σ = 380426592. Its totient is φ = 112872960.

The previous prime is 213989129. The next prime is 213989141. The reversal of 213989139 is 931989312.

It is a happy number.

It is not a de Polignac number, because 213989139 - 2⁴ = 213989123 is a prime.

It is a super-2 number, since 2×213989139² = 91582703219922642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213989094 and 213989103.

It is not an unprimeable number, because it can be changed into a prime (213989119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129822 + ... + 131459.

It is an arithmetic number, because the mean of its divisors is an integer number (15851108).

Almost surely, 2^213989139 is an apocalyptic number.

213989139 is a deficient number, since it is larger than the sum of its proper divisors (166437453).

213989139 is a wasteful number, since it uses less digits than its factorization.

213989139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261307 (or 261304 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 213989139 is about 14628.3676122799. The cubic root of 213989139 is about 598.1322837594.

The spelling of 213989139 in words is "two hundred thirteen million, nine hundred eighty-nine thousand, one hundred thirty-nine".