61907147 has 2 divisors, whose sum is σ = 61907148. Its totient is φ = 61907146.

The previous prime is 61907123. The next prime is 61907161. The reversal of 61907147 is 74170916.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61907147 is a prime.

It is not a weakly prime, because it can be changed into another prime (61907117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30953573 + 30953574.

It is an arithmetic number, because the mean of its divisors is an integer number (30953574).

Almost surely, 2^61907147 is an apocalyptic number.

61907147 is a deficient number, since it is larger than the sum of its proper divisors (1).

61907147 is an equidigital number, since it uses as much as digits as its factorization.

61907147 is an evil number, because the sum of its binary digits is even.

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

The square root of 61907147 is about 7868.1094933917. The cubic root of 61907147 is about 395.5914804718.

The spelling of 61907147 in words is "sixty-one million, nine hundred seven thousand, one hundred forty-seven".