611864139 has 16 divisors (see below), whose sum is σ = 821583360. Its totient is φ = 405037920.

The previous prime is 611864137. The next prime is 611864177. The reversal of 611864139 is 931468116.

It is not a de Polignac number, because 611864139 - 2¹ = 611864137 is a prime.

It is a super-2 number, since 2×611864139² = 748755449188422642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 611864097 and 611864106.

It is not an unprimeable number, because it can be changed into a prime (611864137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300844 + ... + 302870.

It is an arithmetic number, because the mean of its divisors is an integer number (51348960).

Almost surely, 2^611864139 is an apocalyptic number.

611864139 is a deficient number, since it is larger than the sum of its proper divisors (209719221).

611864139 is a wasteful number, since it uses less digits than its factorization.

611864139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690.

The product of its digits is 31104, while the sum is 39.

The square root of 611864139 is about 24735.8876735807. The cubic root of 611864139 is about 848.9556442481.

The spelling of 611864139 in words is "six hundred eleven million, eight hundred sixty-four thousand, one hundred thirty-nine".