97628287 has 2 divisors, whose sum is σ = 97628288. Its totient is φ = 97628286.

The previous prime is 97628281. The next prime is 97628309. The reversal of 97628287 is 78282679.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97628287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97628287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97628281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48814143 + 48814144.

It is an arithmetic number, because the mean of its divisors is an integer number (48814144).

Almost surely, 2^97628287 is an apocalyptic number.

97628287 is a deficient number, since it is larger than the sum of its proper divisors (1).

97628287 is an equidigital number, since it uses as much as digits as its factorization.

97628287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 49.

The square root of 97628287 is about 9880.7027584074. The cubic root of 97628287 is about 460.4599793964.

The spelling of 97628287 in words is "ninety-seven million, six hundred twenty-eight thousand, two hundred eighty-seven".