61540417 has 2 divisors, whose sum is σ = 61540418. Its totient is φ = 61540416.

The previous prime is 61540403. The next prime is 61540421. The reversal of 61540417 is 71404516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36048016 + 25492401 = 6004^2 + 5049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61540417 is a prime.

It is equal to p_3648025 and since 61540417 and 3648025 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (61547417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30770208 + 30770209.

It is an arithmetic number, because the mean of its divisors is an integer number (30770209).

Almost surely, 2^61540417 is an apocalyptic number.

It is an amenable number.

61540417 is a deficient number, since it is larger than the sum of its proper divisors (1).

61540417 is an equidigital number, since it uses as much as digits as its factorization.

61540417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 61540417 is about 7844.7700412440. The cubic root of 61540417 is about 394.8087885087.

The spelling of 61540417 in words is "sixty-one million, five hundred forty thousand, four hundred seventeen".