60807991 has 2 divisors, whose sum is σ = 60807992. Its totient is φ = 60807990.

The previous prime is 60807953. The next prime is 60808003. The reversal of 60807991 is 19970806.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 60807991 - 2⁹ = 60807479 is a prime.

It is a super-2 number, since 2×60807991² = 7395223538912162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60807191) 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, 30403995 + 30403996.

It is an arithmetic number, because the mean of its divisors is an integer number (30403996).

Almost surely, 2^60807991 is an apocalyptic number.

60807991 is a deficient number, since it is larger than the sum of its proper divisors (1).

60807991 is an equidigital number, since it uses as much as digits as its factorization.

60807991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 60807991 is about 7797.9478710748. The cubic root of 60807991 is about 393.2362552883.

The spelling of 60807991 in words is "sixty million, eight hundred seven thousand, nine hundred ninety-one".