97578133 has 2 divisors, whose sum is σ = 97578134. Its totient is φ = 97578132.

The previous prime is 97578097. The next prime is 97578149. The reversal of 97578133 is 33187579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97574884 + 3249 = 9878^2 + 57^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97578133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97578133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97570133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48789066 + 48789067.

It is an arithmetic number, because the mean of its divisors is an integer number (48789067).

Almost surely, 2^97578133 is an apocalyptic number.

It is an amenable number.

97578133 is a deficient number, since it is larger than the sum of its proper divisors (1).

97578133 is an equidigital number, since it uses as much as digits as its factorization.

97578133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The square root of 97578133 is about 9878.1644549987. The cubic root of 97578133 is about 460.3811161001.

The spelling of 97578133 in words is "ninety-seven million, five hundred seventy-eight thousand, one hundred thirty-three".