61500199 has 2 divisors, whose sum is σ = 61500200. Its totient is φ = 61500198.

The previous prime is 61500163. The next prime is 61500211. The reversal of 61500199 is 99100516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61500199 - 2⁷ = 61500071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61500199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61500149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30750099 + 30750100.

It is an arithmetic number, because the mean of its divisors is an integer number (30750100).

Almost surely, 2^61500199 is an apocalyptic number.

61500199 is a deficient number, since it is larger than the sum of its proper divisors (1).

61500199 is an equidigital number, since it uses as much as digits as its factorization.

61500199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 61500199 is about 7842.2062584454. The cubic root of 61500199 is about 394.7227643918.

The spelling of 61500199 in words is "sixty-one million, five hundred thousand, one hundred ninety-nine".