61896539 has 2 divisors, whose sum is σ = 61896540. Its totient is φ = 61896538.

The previous prime is 61896533. The next prime is 61896557. The reversal of 61896539 is 93569816.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61896539 is a prime.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 61896493 and 61896502.

It is not a weakly prime, because it can be changed into another prime (61896533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30948269 + 30948270.

It is an arithmetic number, because the mean of its divisors is an integer number (30948270).

Almost surely, 2^61896539 is an apocalyptic number.

61896539 is a deficient number, since it is larger than the sum of its proper divisors (1).

61896539 is an equidigital number, since it uses as much as digits as its factorization.

61896539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 61896539 is about 7867.4353508624. The cubic root of 61896539 is about 395.5688838663.

The spelling of 61896539 in words is "sixty-one million, eight hundred ninety-six thousand, five hundred thirty-nine".