61457017 has 2 divisors, whose sum is σ = 61457018. Its totient is φ = 61457016.

The previous prime is 61457009. The next prime is 61457027. The reversal of 61457017 is 71075416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59351616 + 2105401 = 7704^2 + 1451^2 .

It is a cyclic number.

It is not a de Polignac number, because 61457017 - 2³ = 61457009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61457017.

It is not a weakly prime, because it can be changed into another prime (61457027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30728508 + 30728509.

It is an arithmetic number, because the mean of its divisors is an integer number (30728509).

Almost surely, 2^61457017 is an apocalyptic number.

It is an amenable number.

61457017 is a deficient number, since it is larger than the sum of its proper divisors (1).

61457017 is an equidigital number, since it uses as much as digits as its factorization.

61457017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 61457017 is about 7839.4525956855. The cubic root of 61457017 is about 394.6303586784.

The spelling of 61457017 in words is "sixty-one million, four hundred fifty-seven thousand, seventeen".