61679699 has 2 divisors, whose sum is σ = 61679700. Its totient is φ = 61679698.

The previous prime is 61679693. The next prime is 61679701. The reversal of 61679699 is 99697616.

61679699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61679699 - 2²⁴ = 44902483 is a prime.

It is a Sophie Germain prime.

Together with 61679701, 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 61679699.

It is not a weakly prime, because it can be changed into another prime (61679693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30839849 + 30839850.

It is an arithmetic number, because the mean of its divisors is an integer number (30839850).

Almost surely, 2^61679699 is an apocalyptic number.

61679699 is a deficient number, since it is larger than the sum of its proper divisors (1).

61679699 is an equidigital number, since it uses as much as digits as its factorization.

61679699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 53.

The square root of 61679699 is about 7853.6424033693. The cubic root of 61679699 is about 395.1064158083.

The spelling of 61679699 in words is "sixty-one million, six hundred seventy-nine thousand, six hundred ninety-nine".