97628692787 has 2 divisors, whose sum is σ = 97628692788. Its totient is φ = 97628692786.

The previous prime is 97628692751. The next prime is 97628692853. The reversal of 97628692787 is 78729682679.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97628692787 - 2¹⁰ = 97628691763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97628692787.

It is not a weakly prime, because it can be changed into another prime (97628692727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48814346393 + 48814346394.

It is an arithmetic number, because the mean of its divisors is an integer number (48814346394).

Almost surely, 2^97628692787 is an apocalyptic number.

97628692787 is a deficient number, since it is larger than the sum of its proper divisors (1).

97628692787 is an equidigital number, since it uses as much as digits as its factorization.

97628692787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256048128, while the sum is 71.

The spelling of 97628692787 in words is "ninety-seven billion, six hundred twenty-eight million, six hundred ninety-two thousand, seven hundred eighty-seven".