61998867 has 18 divisors (see below), whose sum is σ = 104175708. Its totient is φ = 35427672.

The previous prime is 61998863. The next prime is 61998877. The reversal of 61998867 is 76889916.

It is not a de Polignac number, because 61998867 - 2² = 61998863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61998863) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 69853 + ... + 70734.

Almost surely, 2^61998867 is an apocalyptic number.

61998867 is a deficient number, since it is larger than the sum of its proper divisors (42176841).

61998867 is a wasteful number, since it uses less digits than its factorization.

61998867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140607 (or 140597 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 61998867 is about 7873.9359281112. The cubic root of 61998867 is about 395.7867500441.

The spelling of 61998867 in words is "sixty-one million, nine hundred ninety-eight thousand, eight hundred sixty-seven".