97689021 has 8 divisors (see below), whose sum is σ = 137913984. Its totient is φ = 61295040.

The previous prime is 97688977. The next prime is 97689037. The reversal of 97689021 is 12098679.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 97689021 - 2⁶ = 97688957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97689521) 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 7 ways as a sum of consecutive naturals, for example, 957685 + ... + 957786.

It is an arithmetic number, because the mean of its divisors is an integer number (17239248).

Almost surely, 2^97689021 is an apocalyptic number.

It is an amenable number.

97689021 is a deficient number, since it is larger than the sum of its proper divisors (40224963).

97689021 is a wasteful number, since it uses less digits than its factorization.

97689021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915491.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 97689021 is about 9883.7756449648. The cubic root of 97689021 is about 460.5554427782. Note that the first 3 decimals are identical.

The spelling of 97689021 in words is "ninety-seven million, six hundred eighty-nine thousand, twenty-one".