1929689423 has 2 divisors, whose sum is σ = 1929689424. Its totient is φ = 1929689422.

The previous prime is 1929689417. The next prime is 1929689473. The reversal of 1929689423 is 3249869291.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1929689423 - 2²⁸ = 1661253967 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1929689473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964844711 + 964844712.

It is an arithmetic number, because the mean of its divisors is an integer number (964844712).

Almost surely, 2^1929689423 is an apocalyptic number.

1929689423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1929689423 is an equidigital number, since it uses as much as digits as its factorization.

1929689423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 53.

The square root of 1929689423 is about 43928.2303649942. The cubic root of 1929689423 is about 1244.9802791455.

The spelling of 1929689423 in words is "one billion, nine hundred twenty-nine million, six hundred eighty-nine thousand, four hundred twenty-three".