97672891 has 4 divisors (see below), whose sum is σ = 97805800. Its totient is φ = 97539984.

The previous prime is 97672877. The next prime is 97672903. The reversal of 97672891 is 19827679.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97672891 - 2¹¹ = 97670843 is a prime.

It is a super-3 number, since 3×97672891³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97672811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65346 + ... + 66823.

It is an arithmetic number, because the mean of its divisors is an integer number (24451450).

Almost surely, 2^97672891 is an apocalyptic number.

97672891 is a deficient number, since it is larger than the sum of its proper divisors (132909).

97672891 is a wasteful number, since it uses less digits than its factorization.

97672891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132908.

The product of its digits is 381024, while the sum is 49.

The square root of 97672891 is about 9882.9596275610. The cubic root of 97672891 is about 460.5300930575.

It can be divided in two parts, 9 and 7672891, that added together give a square (7672900 = 2770²).

The spelling of 97672891 in words is "ninety-seven million, six hundred seventy-two thousand, eight hundred ninety-one".