60646639 has 2 divisors, whose sum is σ = 60646640. Its totient is φ = 60646638.

The previous prime is 60646609. The next prime is 60646661. The reversal of 60646639 is 93664606.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 60646639 - 2¹³ = 60638447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60646609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30323319 + 30323320.

It is an arithmetic number, because the mean of its divisors is an integer number (30323320).

Almost surely, 2^60646639 is an apocalyptic number.

60646639 is a deficient number, since it is larger than the sum of its proper divisors (1).

60646639 is an equidigital number, since it uses as much as digits as its factorization.

60646639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 60646639 is about 7787.5952000602. The cubic root of 60646639 is about 392.8881340494. Note that the first 3 decimals are identical.

The spelling of 60646639 in words is "sixty million, six hundred forty-six thousand, six hundred thirty-nine".