61611679 has 2 divisors, whose sum is σ = 61611680. Its totient is φ = 61611678.

The previous prime is 61611677. The next prime is 61611691. The reversal of 61611679 is 97611616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61611679 - 2¹ = 61611677 is a prime.

Together with 61611677, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61611677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30805839 + 30805840.

It is an arithmetic number, because the mean of its divisors is an integer number (30805840).

Almost surely, 2^61611679 is an apocalyptic number.

61611679 is a deficient number, since it is larger than the sum of its proper divisors (1).

61611679 is an equidigital number, since it uses as much as digits as its factorization.

61611679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 61611679 is about 7849.3107340709. The cubic root of 61611679 is about 394.9611220615.

The spelling of 61611679 in words is "sixty-one million, six hundred eleven thousand, six hundred seventy-nine".