60640739 has 2 divisors, whose sum is σ = 60640740. Its totient is φ = 60640738.

The previous prime is 60640709. The next prime is 60640757. The reversal of 60640739 is 93704606.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 60640739 - 2⁸ = 60640483 is a prime.

It is a super-2 number, since 2×60640739² = 7354598452932242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 60640699 and 60640708.

It is not a weakly prime, because it can be changed into another prime (60640709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30320369 + 30320370.

It is an arithmetic number, because the mean of its divisors is an integer number (30320370).

Almost surely, 2^60640739 is an apocalyptic number.

60640739 is a deficient number, since it is larger than the sum of its proper divisors (1).

60640739 is an equidigital number, since it uses as much as digits as its factorization.

60640739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 60640739 is about 7787.2163832784. The cubic root of 60640739 is about 392.8753929468.

The spelling of 60640739 in words is "sixty million, six hundred forty thousand, seven hundred thirty-nine".