61172807 has 2 divisors, whose sum is σ = 61172808. Its totient is φ = 61172806.

The previous prime is 61172777. The next prime is 61172821. The reversal of 61172807 is 70827116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61172807 - 2¹⁰ = 61171783 is a prime.

It is a super-2 number, since 2×61172807² = 7484224632518498, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61172887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30586403 + 30586404.

It is an arithmetic number, because the mean of its divisors is an integer number (30586404).

Almost surely, 2^61172807 is an apocalyptic number.

61172807 is a deficient number, since it is larger than the sum of its proper divisors (1).

61172807 is an equidigital number, since it uses as much as digits as its factorization.

61172807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 61172807 is about 7821.3046865597. The cubic root of 61172807 is about 394.0210914869.

The spelling of 61172807 in words is "sixty-one million, one hundred seventy-two thousand, eight hundred seven".