61634897 has 2 divisors, whose sum is σ = 61634898. Its totient is φ = 61634896.

The previous prime is 61634863. The next prime is 61634927. The reversal of 61634897 is 79843616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42981136 + 18653761 = 6556^2 + 4319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61634897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61637897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30817448 + 30817449.

It is an arithmetic number, because the mean of its divisors is an integer number (30817449).

Almost surely, 2^61634897 is an apocalyptic number.

It is an amenable number.

61634897 is a deficient number, since it is larger than the sum of its proper divisors (1).

61634897 is an equidigital number, since it uses as much as digits as its factorization.

61634897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 61634897 is about 7850.7895781252. The cubic root of 61634897 is about 395.0107287584.

The spelling of 61634897 in words is "sixty-one million, six hundred thirty-four thousand, eight hundred ninety-seven".