61031699 has 2 divisors, whose sum is σ = 61031700. Its totient is φ = 61031698.

The previous prime is 61031669. The next prime is 61031753. The reversal of 61031699 is 99613016.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61031699 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61031609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30515849 + 30515850.

It is an arithmetic number, because the mean of its divisors is an integer number (30515850).

Almost surely, 2^61031699 is an apocalyptic number.

61031699 is a deficient number, since it is larger than the sum of its proper divisors (1).

61031699 is an equidigital number, since it uses as much as digits as its factorization.

61031699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 61031699 is about 7812.2787328666. The cubic root of 61031699 is about 393.7178939472.

The spelling of 61031699 in words is "sixty-one million, thirty-one thousand, six hundred ninety-nine".