611972687 has 2 divisors, whose sum is σ = 611972688. Its totient is φ = 611972686.

The previous prime is 611972671. The next prime is 611972717. The reversal of 611972687 is 786279116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611972687 - 2⁴ = 611972671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611972887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305986343 + 305986344.

It is an arithmetic number, because the mean of its divisors is an integer number (305986344).

Almost surely, 2^611972687 is an apocalyptic number.

611972687 is a deficient number, since it is larger than the sum of its proper divisors (1).

611972687 is an equidigital number, since it uses as much as digits as its factorization.

611972687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 611972687 is about 24738.0817162528. The cubic root of 611972687 is about 849.0058443838.

The spelling of 611972687 in words is "six hundred eleven million, nine hundred seventy-two thousand, six hundred eighty-seven".