61449517 has 2 divisors, whose sum is σ = 61449518. Its totient is φ = 61449516.

The previous prime is 61449481. The next prime is 61449523. The reversal of 61449517 is 71594416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47692836 + 13756681 = 6906^2 + 3709^2 .

It is a cyclic number.

It is not a de Polignac number, because 61449517 - 2¹⁵ = 61416749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61449527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30724758 + 30724759.

It is an arithmetic number, because the mean of its divisors is an integer number (30724759).

Almost surely, 2^61449517 is an apocalyptic number.

It is an amenable number.

61449517 is a deficient number, since it is larger than the sum of its proper divisors (1).

61449517 is an equidigital number, since it uses as much as digits as its factorization.

61449517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 61449517 is about 7838.9742313647. The cubic root of 61449517 is about 394.6143049211.

The spelling of 61449517 in words is "sixty-one million, four hundred forty-nine thousand, five hundred seventeen".