1538645323 has 4 divisors (see below), whose sum is σ = 1542072600. Its totient is φ = 1535218048.

The previous prime is 1538645291. The next prime is 1538645347. The reversal of 1538645323 is 3235468351.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1538645323 - 2⁵ = 1538645291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1538642323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1712965 + ... + 1713862.

It is an arithmetic number, because the mean of its divisors is an integer number (385518150).

Almost surely, 2^1538645323 is an apocalyptic number.

1538645323 is a deficient number, since it is larger than the sum of its proper divisors (3427277).

1538645323 is an equidigital number, since it uses as much as digits as its factorization.

1538645323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3427276.

The product of its digits is 259200, while the sum is 40.

The square root of 1538645323 is about 39225.5697600430. The cubic root of 1538645323 is about 1154.4616402468.

The spelling of 1538645323 in words is "one billion, five hundred thirty-eight million, six hundred forty-five thousand, three hundred twenty-three".