97943557 has 2 divisors, whose sum is σ = 97943558. Its totient is φ = 97943556.

The previous prime is 97943533. The next prime is 97943581. The reversal of 97943557 is 75534979.

It is a balanced prime because it is at equal distance from previous prime (97943533) and next prime (97943581).

It can be written as a sum of positive squares in only one way, i.e., 93818596 + 4124961 = 9686^2 + 2031^2 .

It is a cyclic number.

It is not a de Polignac number, because 97943557 - 2⁷ = 97943429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97943557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97943597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48971778 + 48971779.

It is an arithmetic number, because the mean of its divisors is an integer number (48971779).

Almost surely, 2^97943557 is an apocalyptic number.

It is an amenable number.

97943557 is a deficient number, since it is larger than the sum of its proper divisors (1).

97943557 is an equidigital number, since it uses as much as digits as its factorization.

97943557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190700, while the sum is 49.

The square root of 97943557 is about 9896.6437240107. The cubic root of 97943557 is about 460.9550996716.

The spelling of 97943557 in words is "ninety-seven million, nine hundred forty-three thousand, five hundred fifty-seven".