1323491900 has 18 divisors (see below), whose sum is σ = 2871977640. Its totient is φ = 529396720.

The previous prime is 1323491899. The next prime is 1323491927. The reversal of 1323491900 is 91943231.

It is a super-2 number, since 2×1323491900² = 3503261618731220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6617360 + ... + 6617559.

Almost surely, 2^1323491900 is an apocalyptic number.

1323491900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323491900 is an abundant number, since it is smaller than the sum of its proper divisors (1548485740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1323491900 is a wasteful number, since it uses less digits than its factorization.

1323491900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13234933 (or 13234926 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1323491900 is about 36379.8282019033. The cubic root of 1323491900 is about 1097.9277515133.

The spelling of 1323491900 in words is "one billion, three hundred twenty-three million, four hundred ninety-one thousand, nine hundred".