61998967 has 2 divisors, whose sum is σ = 61998968. Its totient is φ = 61998966.

The previous prime is 61998947. The next prime is 61999001. The reversal of 61998967 is 76989916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61998967 - 2¹⁵ = 61966199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61998947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30999483 + 30999484.

It is an arithmetic number, because the mean of its divisors is an integer number (30999484).

Almost surely, 2^61998967 is an apocalyptic number.

61998967 is a deficient number, since it is larger than the sum of its proper divisors (1).

61998967 is an equidigital number, since it uses as much as digits as its factorization.

61998967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 55.

The square root of 61998967 is about 7873.9422781730. The cubic root of 61998967 is about 395.7869628365.

The spelling of 61998967 in words is "sixty-one million, nine hundred ninety-eight thousand, nine hundred sixty-seven".