97213638 has 8 divisors (see below), whose sum is σ = 194427288. Its totient is φ = 32404544.

The previous prime is 97213637. The next prime is 97213639. The reversal of 97213638 is 83631279.

It is an interprime number because it is at equal distance from previous prime (97213637) and next prime (97213639).

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

97213638 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 97213596 and 97213605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97213631) 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, 8101131 + ... + 8101142.

It is an arithmetic number, because the mean of its divisors is an integer number (24303411).

Almost surely, 2^97213638 is an apocalyptic number.

97213638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97213638 is a wasteful number, since it uses less digits than its factorization.

97213638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16202278.

The product of its digits is 54432, while the sum is 39.

The square root of 97213638 is about 9859.6976627075. The cubic root of 97213638 is about 459.8071623976.

The spelling of 97213638 in words is "ninety-seven million, two hundred thirteen thousand, six hundred thirty-eight".