61520597 has 2 divisors, whose sum is σ = 61520598. Its totient is φ = 61520596.

The previous prime is 61520593. The next prime is 61520611. The reversal of 61520597 is 79502516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55562116 + 5958481 = 7454^2 + 2441^2 .

It is a cyclic number.

It is not a de Polignac number, because 61520597 - 2² = 61520593 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61520593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30760298 + 30760299.

It is an arithmetic number, because the mean of its divisors is an integer number (30760299).

Almost surely, 2^61520597 is an apocalyptic number.

It is an amenable number.

61520597 is a deficient number, since it is larger than the sum of its proper divisors (1).

61520597 is an equidigital number, since it uses as much as digits as its factorization.

61520597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 61520597 is about 7843.5066775008. The cubic root of 61520597 is about 394.7663992910.

It can be divided in two parts, 615 and 20597, that added together give a palindrome (21212).

The spelling of 61520597 in words is "sixty-one million, five hundred twenty thousand, five hundred ninety-seven".