1538642323 has 2 divisors, whose sum is σ = 1538642324. Its totient is φ = 1538642322.

The previous prime is 1538642321. The next prime is 1538642353. The reversal of 1538642323 is 3232468351.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1538642323 - 2¹ = 1538642321 is a prime.

Together with 1538642321, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1538642321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769321161 + 769321162.

It is an arithmetic number, because the mean of its divisors is an integer number (769321162).

Almost surely, 2^1538642323 is an apocalyptic number.

1538642323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538642323 is an equidigital number, since it uses as much as digits as its factorization.

1538642323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 37.

The square root of 1538642323 is about 39225.5315196620. The cubic root of 1538642323 is about 1154.4608899359.

The spelling of 1538642323 in words is "one billion, five hundred thirty-eight million, six hundred forty-two thousand, three hundred twenty-three".