97886381 has 2 divisors, whose sum is σ = 97886382. Its totient is φ = 97886380.

The previous prime is 97886353. The next prime is 97886387. The reversal of 97886381 is 18368879.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73788100 + 24098281 = 8590^2 + 4909^2 .

It is an emirp because it is prime and its reverse (18368879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97886381 - 2²² = 93692077 is a prime.

It is a super-2 number, since 2×97886381² = 19163487170554322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97886387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48943190 + 48943191.

It is an arithmetic number, because the mean of its divisors is an integer number (48943191).

Almost surely, 2^97886381 is an apocalyptic number.

It is an amenable number.

97886381 is a deficient number, since it is larger than the sum of its proper divisors (1).

97886381 is an equidigital number, since it uses as much as digits as its factorization.

97886381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 97886381 is about 9893.7546462402. The cubic root of 97886381 is about 460.8653857597.

It can be divided in two parts, 97886 and 381, that multiplied together give a triangular number (37294566 = T₈₆₃₆).

The spelling of 97886381 in words is "ninety-seven million, eight hundred eighty-six thousand, three hundred eighty-one".