61992569 has 2 divisors, whose sum is σ = 61992570. Its totient is φ = 61992568.

The previous prime is 61992547. The next prime is 61992583. The reversal of 61992569 is 96529916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37982569 + 24010000 = 6163^2 + 4900^2 .

It is a cyclic number.

It is not a de Polignac number, because 61992569 - 2⁸ = 61992313 is a prime.

It is a super-2 number, since 2×61992569² = 7686157222439522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (61992509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30996284 + 30996285.

It is an arithmetic number, because the mean of its divisors is an integer number (30996285).

Almost surely, 2^61992569 is an apocalyptic number.

It is an amenable number.

61992569 is a deficient number, since it is larger than the sum of its proper divisors (1).

61992569 is an equidigital number, since it uses as much as digits as its factorization.

61992569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 47.

The square root of 61992569 is about 7873.5359909001. The cubic root of 61992569 is about 395.7733479209.

The spelling of 61992569 in words is "sixty-one million, nine hundred ninety-two thousand, five hundred sixty-nine".