61774859 has 2 divisors, whose sum is σ = 61774860. Its totient is φ = 61774858.

The previous prime is 61774819. The next prime is 61774877. The reversal of 61774859 is 95847716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61774859 - 2¹² = 61770763 is a prime.

It is a super-2 number, since 2×61774859² = 7632266408939762, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61774819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30887429 + 30887430.

It is an arithmetic number, because the mean of its divisors is an integer number (30887430).

Almost surely, 2^61774859 is an apocalyptic number.

61774859 is a deficient number, since it is larger than the sum of its proper divisors (1).

61774859 is an equidigital number, since it uses as much as digits as its factorization.

61774859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 47.

The square root of 61774859 is about 7859.6984038829. The cubic root of 61774859 is about 395.3095026587.

The spelling of 61774859 in words is "sixty-one million, seven hundred seventy-four thousand, eight hundred fifty-nine".