61297217 has 2 divisors, whose sum is σ = 61297218. Its totient is φ = 61297216.

The previous prime is 61297207. The next prime is 61297241. The reversal of 61297217 is 71279216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57896881 + 3400336 = 7609^2 + 1844^2 .

It is a cyclic number.

It is not a de Polignac number, because 61297217 - 2²⁰ = 60248641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61297207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30648608 + 30648609.

It is an arithmetic number, because the mean of its divisors is an integer number (30648609).

Almost surely, 2^61297217 is an apocalyptic number.

It is an amenable number.

61297217 is a deficient number, since it is larger than the sum of its proper divisors (1).

61297217 is an equidigital number, since it uses as much as digits as its factorization.

61297217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 35.

The square root of 61297217 is about 7829.2539235868. The cubic root of 61297217 is about 394.2880236547.

The spelling of 61297217 in words is "sixty-one million, two hundred ninety-seven thousand, two hundred seventeen".