97142381 has 8 divisors (see below), whose sum is σ = 111264384. Its totient is φ = 83081520.

The previous prime is 97142351. The next prime is 97142399. The reversal of 97142381 is 18324179.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97142381 is a prime.

It is a super-2 number, since 2×97142381² = 18873284372698322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97142321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11825 + ... + 18278.

It is an arithmetic number, because the mean of its divisors is an integer number (13908048).

Almost surely, 2^97142381 is an apocalyptic number.

It is an amenable number.

97142381 is a deficient number, since it is larger than the sum of its proper divisors (14122003).

97142381 is a wasteful number, since it uses less digits than its factorization.

97142381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30571.

The product of its digits is 12096, while the sum is 35.

The square root of 97142381 is about 9856.0834513513. The cubic root of 97142381 is about 459.6947896610.

The spelling of 97142381 in words is "ninety-seven million, one hundred forty-two thousand, three hundred eighty-one".