61895539 has 2 divisors, whose sum is σ = 61895540. Its totient is φ = 61895538.

The previous prime is 61895443. The next prime is 61895551. The reversal of 61895539 is 93559816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61895539 - 2²⁵ = 28341107 is a prime.

It is not a weakly prime, because it can be changed into another prime (61895579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30947769 + 30947770.

It is an arithmetic number, because the mean of its divisors is an integer number (30947770).

Almost surely, 2^61895539 is an apocalyptic number.

61895539 is a deficient number, since it is larger than the sum of its proper divisors (1).

61895539 is an equidigital number, since it uses as much as digits as its factorization.

61895539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 46.

The square root of 61895539 is about 7867.3717974937. The cubic root of 61895539 is about 395.5667535855.

The spelling of 61895539 in words is "sixty-one million, eight hundred ninety-five thousand, five hundred thirty-nine".