61895917 has 2 divisors, whose sum is σ = 61895918. Its totient is φ = 61895916.

The previous prime is 61895903. The next prime is 61895959. The reversal of 61895917 is 71959816.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38266596 + 23629321 = 6186^2 + 4861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61895917 is a prime.

It is a super-2 number, since 2×61895917² = 7662209082541778, 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 (61895987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30947958 + 30947959.

It is an arithmetic number, because the mean of its divisors is an integer number (30947959).

Almost surely, 2^61895917 is an apocalyptic number.

It is an amenable number.

61895917 is a deficient number, since it is larger than the sum of its proper divisors (1).

61895917 is an equidigital number, since it uses as much as digits as its factorization.

61895917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 46.

The square root of 61895917 is about 7867.3958207275. The cubic root of 61895917 is about 395.5675588343.

The spelling of 61895917 in words is "sixty-one million, eight hundred ninety-five thousand, nine hundred seventeen".