97662557 has 2 divisors, whose sum is σ = 97662558. Its totient is φ = 97662556.

The previous prime is 97662491. The next prime is 97662613. The reversal of 97662557 is 75526679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81830116 + 15832441 = 9046^2 + 3979^2 .

It is an emirp because it is prime and its reverse (75526679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97662557 - 2¹⁴ = 97646173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97362557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48831278 + 48831279.

It is an arithmetic number, because the mean of its divisors is an integer number (48831279).

Almost surely, 2^97662557 is an apocalyptic number.

It is an amenable number.

97662557 is a deficient number, since it is larger than the sum of its proper divisors (1).

97662557 is an equidigital number, since it uses as much as digits as its factorization.

97662557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 47.

The square root of 97662557 is about 9882.4367946372. The cubic root of 97662557 is about 460.5138507963.

The spelling of 97662557 in words is "ninety-seven million, six hundred sixty-two thousand, five hundred fifty-seven".