61701139 has 2 divisors, whose sum is σ = 61701140. Its totient is φ = 61701138.

The previous prime is 61701091. The next prime is 61701149. The reversal of 61701139 is 93110716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61701139 - 2⁹ = 61700627 is a prime.

It is not a weakly prime, because it can be changed into another prime (61701149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30850569 + 30850570.

It is an arithmetic number, because the mean of its divisors is an integer number (30850570).

Almost surely, 2^61701139 is an apocalyptic number.

61701139 is a deficient number, since it is larger than the sum of its proper divisors (1).

61701139 is an equidigital number, since it uses as much as digits as its factorization.

61701139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 61701139 is about 7855.0072565212. The cubic root of 61701139 is about 395.1521904600.

The spelling of 61701139 in words is "sixty-one million, seven hundred one thousand, one hundred thirty-nine".