61791607 has 2 divisors, whose sum is σ = 61791608. Its totient is φ = 61791606.

The previous prime is 61791601. The next prime is 61791647. The reversal of 61791607 is 70619716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61791607 - 2³ = 61791599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61791601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30895803 + 30895804.

It is an arithmetic number, because the mean of its divisors is an integer number (30895804).

Almost surely, 2^61791607 is an apocalyptic number.

61791607 is a deficient number, since it is larger than the sum of its proper divisors (1).

61791607 is an equidigital number, since it uses as much as digits as its factorization.

61791607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 61791607 is about 7860.7637669631. The cubic root of 61791607 is about 395.3452240154.

The spelling of 61791607 in words is "sixty-one million, seven hundred ninety-one thousand, six hundred seven".