60840139 has 2 divisors, whose sum is σ = 60840140. Its totient is φ = 60840138.

The previous prime is 60840107. The next prime is 60840149. The reversal of 60840139 is 93104806.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 60840139 - 2⁵ = 60840107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 60840139.

It is not a weakly prime, because it can be changed into another prime (60840149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30420069 + 30420070.

It is an arithmetic number, because the mean of its divisors is an integer number (30420070).

Almost surely, 2^60840139 is an apocalyptic number.

60840139 is a deficient number, since it is larger than the sum of its proper divisors (1).

60840139 is an equidigital number, since it uses as much as digits as its factorization.

60840139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 60840139 is about 7800.0089102513. The cubic root of 60840139 is about 393.3055418616.

The spelling of 60840139 in words is "sixty million, eight hundred forty thousand, one hundred thirty-nine".