1813011907 has 10 divisors (see below), whose sum is σ = 2115057508. Its totient is φ = 1554008148.

The previous prime is 1813011899. The next prime is 1813011943. The reversal of 1813011907 is 7091103181.

It is not a de Polignac number, because 1813011907 - 2³ = 1813011899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813011947) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 375153 + ... + 379954.

Almost surely, 2^1813011907 is an apocalyptic number.

1813011907 is a deficient number, since it is larger than the sum of its proper divisors (302045601).

1813011907 is an frugal number, since it uses more digits than its factorization.

1813011907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755135 (or 755114 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 31.

The square root of 1813011907 is about 42579.4775331967. The cubic root of 1813011907 is about 1219.3645142871.

The spelling of 1813011907 in words is "one billion, eight hundred thirteen million, eleven thousand, nine hundred seven".