61940569 has 2 divisors, whose sum is σ = 61940570. Its totient is φ = 61940568.

The previous prime is 61940563. The next prime is 61940579. The reversal of 61940569 is 96504916.

61940569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46416969 + 15523600 = 6813^2 + 3940^2 .

It is a cyclic number.

It is not a de Polignac number, because 61940569 - 2³ = 61940561 is a prime.

It is a super-2 number, since 2×61940569² = 7673268176087522, which contains 22 as substring.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (61940561) 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, 30970284 + 30970285.

It is an arithmetic number, because the mean of its divisors is an integer number (30970285).

Almost surely, 2^61940569 is an apocalyptic number.

It is an amenable number.

61940569 is a deficient number, since it is larger than the sum of its proper divisors (1).

61940569 is an equidigital number, since it uses as much as digits as its factorization.

61940569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 61940569 is about 7870.2330969292. The cubic root of 61940569 is about 395.6626573903.

The spelling of 61940569 in words is "sixty-one million, nine hundred forty thousand, five hundred sixty-nine".