61607947 has 2 divisors, whose sum is σ = 61607948. Its totient is φ = 61607946.

The previous prime is 61607927. The next prime is 61607951. The reversal of 61607947 is 74970616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61607947 - 2¹⁵ = 61575179 is a prime.

It is not a weakly prime, because it can be changed into another prime (61607927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30803973 + 30803974.

It is an arithmetic number, because the mean of its divisors is an integer number (30803974).

Almost surely, 2^61607947 is an apocalyptic number.

61607947 is a deficient number, since it is larger than the sum of its proper divisors (1).

61607947 is an equidigital number, since it uses as much as digits as its factorization.

61607947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 61607947 is about 7849.0730025908. The cubic root of 61607947 is about 394.9531472495.

The spelling of 61607947 in words is "sixty-one million, six hundred seven thousand, nine hundred forty-seven".