1657319423 has 2 divisors, whose sum is σ = 1657319424. Its totient is φ = 1657319422.

The previous prime is 1657319357. The next prime is 1657319471. The reversal of 1657319423 is 3249137561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1657319423 - 2¹² = 1657315327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1657319623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828659711 + 828659712.

It is an arithmetic number, because the mean of its divisors is an integer number (828659712).

Almost surely, 2^1657319423 is an apocalyptic number.

1657319423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1657319423 is an equidigital number, since it uses as much as digits as its factorization.

1657319423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 1657319423 is about 40710.1881965682. The cubic root of 1657319423 is about 1183.4104683876.

The spelling of 1657319423 in words is "one billion, six hundred fifty-seven million, three hundred nineteen thousand, four hundred twenty-three".