97542491 has 2 divisors, whose sum is σ = 97542492. Its totient is φ = 97542490.

The previous prime is 97542479. The next prime is 97542499. The reversal of 97542491 is 19424579.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97542491 - 2¹⁰ = 97541467 is a prime.

It is not a weakly prime, because it can be changed into another prime (97542499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48771245 + 48771246.

It is an arithmetic number, because the mean of its divisors is an integer number (48771246).

Almost surely, 2^97542491 is an apocalyptic number.

97542491 is a deficient number, since it is larger than the sum of its proper divisors (1).

97542491 is an equidigital number, since it uses as much as digits as its factorization.

97542491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 97542491 is about 9876.3602101179. The cubic root of 97542491 is about 460.3250553772.

The spelling of 97542491 in words is "ninety-seven million, five hundred forty-two thousand, four hundred ninety-one".