61499699 has 2 divisors, whose sum is σ = 61499700. Its totient is φ = 61499698.

The previous prime is 61499689. The next prime is 61499701. The reversal of 61499699 is 99699416.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61499699 is a prime.

It is a Sophie Germain prime.

Together with 61499701, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61499699.

It is not a weakly prime, because it can be changed into another prime (61499639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30749849 + 30749850.

It is an arithmetic number, because the mean of its divisors is an integer number (30749850).

Almost surely, 2^61499699 is an apocalyptic number.

61499699 is a deficient number, since it is larger than the sum of its proper divisors (1).

61499699 is an equidigital number, since it uses as much as digits as its factorization.

61499699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 53.

The square root of 61499699 is about 7842.1743795965. The cubic root of 61499699 is about 394.7216946830.

The spelling of 61499699 in words is "sixty-one million, four hundred ninety-nine thousand, six hundred ninety-nine".