97989767 has 4 divisors (see below), whose sum is σ = 98497680. Its totient is φ = 97481856.

The previous prime is 97989763. The next prime is 97989769. The reversal of 97989767 is 76798979.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76798979 = 17 ⋅4517587.

It is a cyclic number.

It is not a de Polignac number, because 97989767 - 2² = 97989763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97989763) 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, 253667 + ... + 254052.

It is an arithmetic number, because the mean of its divisors is an integer number (24624420).

Almost surely, 2^97989767 is an apocalyptic number.

97989767 is a deficient number, since it is larger than the sum of its proper divisors (507913).

97989767 is a wasteful number, since it uses less digits than its factorization.

97989767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507912.

The product of its digits is 12002256, while the sum is 62.

The square root of 97989767 is about 9898.9780785695. The cubic root of 97989767 is about 461.0275815063.

The spelling of 97989767 in words is "ninety-seven million, nine hundred eighty-nine thousand, seven hundred sixty-seven".