97638377 has 2 divisors, whose sum is σ = 97638378. Its totient is φ = 97638376.

The previous prime is 97638371. The next prime is 97638379. The reversal of 97638377 is 77383679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66846976 + 30791401 = 8176^2 + 5549^2 .

It is an emirp because it is prime and its reverse (77383679) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97638377 is a prime.

Together with 97638379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97638371) 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 as a sum of consecutive naturals, namely, 48819188 + 48819189.

It is an arithmetic number, because the mean of its divisors is an integer number (48819189).

Almost surely, 2^97638377 is an apocalyptic number.

It is an amenable number.

97638377 is a deficient number, since it is larger than the sum of its proper divisors (1).

97638377 is an equidigital number, since it uses as much as digits as its factorization.

97638377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 50.

The square root of 97638377 is about 9881.2133364279. The cubic root of 97638377 is about 460.4758418795.

The spelling of 97638377 in words is "ninety-seven million, six hundred thirty-eight thousand, three hundred seventy-seven".