139937461 has 2 divisors, whose sum is σ = 139937462. Its totient is φ = 139937460.

The previous prime is 139937401. The next prime is 139937507. The reversal of 139937461 is 164739931.

139937461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137030436 + 2907025 = 11706^2 + 1705^2 .

It is a cyclic number.

It is not a de Polignac number, because 139937461 - 2⁹ = 139936949 is a prime.

It is a super-2 number, since 2×139937461² = 39164985982253042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139937401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69968730 + 69968731.

It is an arithmetic number, because the mean of its divisors is an integer number (69968731).

Almost surely, 2^139937461 is an apocalyptic number.

It is an amenable number.

139937461 is a deficient number, since it is larger than the sum of its proper divisors (1).

139937461 is an equidigital number, since it uses as much as digits as its factorization.

139937461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 139937461 is about 11829.5165159021. The cubic root of 139937461 is about 519.1720811960.

The spelling of 139937461 in words is "one hundred thirty-nine million, nine hundred thirty-seven thousand, four hundred sixty-one".