97210381 has 4 divisors (see below), whose sum is σ = 97249600. Its totient is φ = 97171164.

The previous prime is 97210363. The next prime is 97210391. The reversal of 97210381 is 18301279.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97210381 - 2²¹ = 95113229 is a prime.

It is a super-4 number, since 4×97210381⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97210331) 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, 15621 + ... + 20938.

It is an arithmetic number, because the mean of its divisors is an integer number (24312400).

Almost surely, 2^97210381 is an apocalyptic number.

It is an amenable number.

97210381 is a deficient number, since it is larger than the sum of its proper divisors (39219).

97210381 is a wasteful number, since it uses less digits than its factorization.

97210381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39218.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 97210381 is about 9859.5324939877. The cubic root of 97210381 is about 459.8020272860.

The spelling of 97210381 in words is "ninety-seven million, two hundred ten thousand, three hundred eighty-one".