60637991 has 2 divisors, whose sum is σ = 60637992. Its totient is φ = 60637990.

The previous prime is 60637939. The next prime is 60638003. The reversal of 60637991 is 19973606.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 60637991 - 2¹⁰ = 60636967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60637921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30318995 + 30318996.

It is an arithmetic number, because the mean of its divisors is an integer number (30318996).

Almost surely, 2^60637991 is an apocalyptic number.

60637991 is a deficient number, since it is larger than the sum of its proper divisors (1).

60637991 is an equidigital number, since it uses as much as digits as its factorization.

60637991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 60637991 is about 7787.0399382564. The cubic root of 60637991 is about 392.8694583341.

The spelling of 60637991 in words is "sixty million, six hundred thirty-seven thousand, nine hundred ninety-one".