61631347 has 2 divisors, whose sum is σ = 61631348. Its totient is φ = 61631346.

The previous prime is 61631333. The next prime is 61631359. The reversal of 61631347 is 74313616.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61631347 is a prime.

It is not a weakly prime, because it can be changed into another prime (61631327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30815673 + 30815674.

It is an arithmetic number, because the mean of its divisors is an integer number (30815674).

Almost surely, 2^61631347 is an apocalyptic number.

61631347 is a deficient number, since it is larger than the sum of its proper divisors (1).

61631347 is an equidigital number, since it uses as much as digits as its factorization.

61631347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 61631347 is about 7850.5634829610. The cubic root of 61631347 is about 395.0031447701.

The spelling of 61631347 in words is "sixty-one million, six hundred thirty-one thousand, three hundred forty-seven".