100640651 has 2 divisors, whose sum is σ = 100640652. Its totient is φ = 100640650.

The previous prime is 100640627. The next prime is 100640671. The reversal of 100640651 is 156046001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100640651 - 2¹⁴ = 100624267 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100640621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50320325 + 50320326.

It is an arithmetic number, because the mean of its divisors is an integer number (50320326).

Almost surely, 2^100640651 is an apocalyptic number.

100640651 is a deficient number, since it is larger than the sum of its proper divisors (1).

100640651 is an equidigital number, since it uses as much as digits as its factorization.

100640651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 100640651 is about 10031.9814094724. The cubic root of 100640651 is about 465.1479869674.

Adding to 100640651 its reverse (156046001), we get a palindrome (256686652).

The spelling of 100640651 in words is "one hundred million, six hundred forty thousand, six hundred fifty-one".