89997967 has 4 divisors (see below), whose sum is σ = 91265616. Its totient is φ = 88730320.

The previous prime is 89997923. The next prime is 89997989. The reversal of 89997967 is 76979998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76979998 = 2 ⋅38489999.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89997967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89997899 and 89997908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89992967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633718 + ... + 633859.

It is an arithmetic number, because the mean of its divisors is an integer number (22816404).

Almost surely, 2^89997967 is an apocalyptic number.

89997967 is a deficient number, since it is larger than the sum of its proper divisors (1267649).

89997967 is a wasteful number, since it uses less digits than its factorization.

89997967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267648.

The product of its digits is 15431472, while the sum is 64.

The square root of 89997967 is about 9486.7258313920. The cubic root of 89997967 is about 448.1371002985.

The spelling of 89997967 in words is "eighty-nine million, nine hundred ninety-seven thousand, nine hundred sixty-seven".