19761923 has 2 divisors, whose sum is σ = 19761924. Its totient is φ = 19761922.

The previous prime is 19761901. The next prime is 19761943. The reversal of 19761923 is 32916791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19761923 - 2¹² = 19757827 is a prime.

It is not a weakly prime, because it can be changed into another prime (19761943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9880961 + 9880962.

It is an arithmetic number, because the mean of its divisors is an integer number (9880962).

Almost surely, 2^19761923 is an apocalyptic number.

19761923 is a deficient number, since it is larger than the sum of its proper divisors (1).

19761923 is an equidigital number, since it uses as much as digits as its factorization.

19761923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 38.

The square root of 19761923 is about 4445.4384485673. The cubic root of 19761923 is about 270.3603920823.

The spelling of 19761923 in words is "nineteen million, seven hundred sixty-one thousand, nine hundred twenty-three".