61408307 has 2 divisors, whose sum is σ = 61408308. Its totient is φ = 61408306.

The previous prime is 61408261. The next prime is 61408327. The reversal of 61408307 is 70380416.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61408307 is a prime.

It is a Chen prime.

It is equal to p_3640655 and since 61408307 and 3640655 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61408307.

It is not a weakly prime, because it can be changed into another prime (61408327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30704153 + 30704154.

It is an arithmetic number, because the mean of its divisors is an integer number (30704154).

Almost surely, 2^61408307 is an apocalyptic number.

61408307 is a deficient number, since it is larger than the sum of its proper divisors (1).

61408307 is an equidigital number, since it uses as much as digits as its factorization.

61408307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 61408307 is about 7836.3452578354. The cubic root of 61408307 is about 394.5260715607.

The spelling of 61408307 in words is "sixty-one million, four hundred eight thousand, three hundred seven".