19790651 has 2 divisors, whose sum is σ = 19790652. Its totient is φ = 19790650.

The previous prime is 19790633. The next prime is 19790653. The reversal of 19790651 is 15609791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19790651 - 2¹⁸ = 19528507 is a prime.

It is a Sophie Germain prime.

Together with 19790653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19790653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9895325 + 9895326.

It is an arithmetic number, because the mean of its divisors is an integer number (9895326).

Almost surely, 2^19790651 is an apocalyptic number.

19790651 is a deficient number, since it is larger than the sum of its proper divisors (1).

19790651 is an equidigital number, since it uses as much as digits as its factorization.

19790651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 19790651 is about 4448.6684524698. The cubic root of 19790651 is about 270.4913367072.

The spelling of 19790651 in words is "nineteen million, seven hundred ninety thousand, six hundred fifty-one".