97142399 has 2 divisors, whose sum is σ = 97142400. Its totient is φ = 97142398.

The previous prime is 97142351. The next prime is 97142401. The reversal of 97142399 is 99324179.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97142399 is a prime.

Together with 97142401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97142599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48571199 + 48571200.

It is an arithmetic number, because the mean of its divisors is an integer number (48571200).

Almost surely, 2^97142399 is an apocalyptic number.

97142399 is a deficient number, since it is larger than the sum of its proper divisors (1).

97142399 is an equidigital number, since it uses as much as digits as its factorization.

97142399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 97142399 is about 9856.0843644928. The cubic root of 97142399 is about 459.6948180541.

The spelling of 97142399 in words is "ninety-seven million, one hundred forty-two thousand, three hundred ninety-nine".