611245139 has 2 divisors, whose sum is σ = 611245140. Its totient is φ = 611245138.

The previous prime is 611245127. The next prime is 611245163. The reversal of 611245139 is 931542116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611245139 - 2⁴ = 611245123 is a prime.

It is a super-2 number, since 2×611245139² = 747241239902258642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (611245169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305622569 + 305622570.

It is an arithmetic number, because the mean of its divisors is an integer number (305622570).

Almost surely, 2^611245139 is an apocalyptic number.

611245139 is a deficient number, since it is larger than the sum of its proper divisors (1).

611245139 is an equidigital number, since it uses as much as digits as its factorization.

611245139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 611245139 is about 24723.3723225615. The cubic root of 611245139 is about 848.6692621246.

The spelling of 611245139 in words is "six hundred eleven million, two hundred forty-five thousand, one hundred thirty-nine".