61338899 has 2 divisors, whose sum is σ = 61338900. Its totient is φ = 61338898.

The previous prime is 61338847. The next prime is 61338913. The reversal of 61338899 is 99883316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61338899 - 2⁸ = 61338643 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61328899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30669449 + 30669450.

It is an arithmetic number, because the mean of its divisors is an integer number (30669450).

Almost surely, 2^61338899 is an apocalyptic number.

61338899 is a deficient number, since it is larger than the sum of its proper divisors (1).

61338899 is an equidigital number, since it uses as much as digits as its factorization.

61338899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 61338899 is about 7831.9154106770. The cubic root of 61338899 is about 394.3773751262.

The spelling of 61338899 in words is "sixty-one million, three hundred thirty-eight thousand, eight hundred ninety-nine".