61658417 has 2 divisors, whose sum is σ = 61658418. Its totient is φ = 61658416.

The previous prime is 61658381. The next prime is 61658447. The reversal of 61658417 is 71485616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60855601 + 802816 = 7801^2 + 896^2 .

It is a cyclic number.

It is not a de Polignac number, because 61658417 - 2⁶ = 61658353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61658447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30829208 + 30829209.

It is an arithmetic number, because the mean of its divisors is an integer number (30829209).

Almost surely, 2^61658417 is an apocalyptic number.

It is an amenable number.

61658417 is a deficient number, since it is larger than the sum of its proper divisors (1).

61658417 is an equidigital number, since it uses as much as digits as its factorization.

61658417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 61658417 is about 7852.2873737529. The cubic root of 61658417 is about 395.0609679966.

The spelling of 61658417 in words is "sixty-one million, six hundred fifty-eight thousand, four hundred seventeen".