61356899 has 2 divisors, whose sum is σ = 61356900. Its totient is φ = 61356898.

The previous prime is 61356877. The next prime is 61356923. The reversal of 61356899 is 99865316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61356899 - 2¹² = 61352803 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61356809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30678449 + 30678450.

It is an arithmetic number, because the mean of its divisors is an integer number (30678450).

Almost surely, 2^61356899 is an apocalyptic number.

61356899 is a deficient number, since it is larger than the sum of its proper divisors (1).

61356899 is an equidigital number, since it uses as much as digits as its factorization.

61356899 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 61356899 is about 7833.0644705632. The cubic root of 61356899 is about 394.4159482481.

The spelling of 61356899 in words is "sixty-one million, three hundred fifty-six thousand, eight hundred ninety-nine".