61974961 has 2 divisors, whose sum is σ = 61974962. Its totient is φ = 61974960.

The previous prime is 61974953. The next prime is 61974973. The reversal of 61974961 is 16947916.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41679936 + 20295025 = 6456^2 + 4505^2 .

It is a cyclic number.

It is not a de Polignac number, because 61974961 - 2³ = 61974953 is a prime.

It is not a weakly prime, because it can be changed into another prime (61974901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30987480 + 30987481.

It is an arithmetic number, because the mean of its divisors is an integer number (30987481).

Almost surely, 2^61974961 is an apocalyptic number.

It is an amenable number.

61974961 is a deficient number, since it is larger than the sum of its proper divisors (1).

61974961 is an equidigital number, since it uses as much as digits as its factorization.

61974961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 61974961 is about 7872.4177353593. The cubic root of 61974961 is about 395.7358733380.

The spelling of 61974961 in words is "sixty-one million, nine hundred seventy-four thousand, nine hundred sixty-one".