1808135097 has 16 divisors (see below), whose sum is σ = 2450033472. Its totient is φ = 1185877440.

The previous prime is 1808135083. The next prime is 1808135101. The reversal of 1808135097 is 7905318081.

It is not a de Polignac number, because 1808135097 - 2⁶ = 1808135033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1808135897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159543 + ... + 170499.

It is an arithmetic number, because the mean of its divisors is an integer number (153127092).

Almost surely, 2^1808135097 is an apocalyptic number.

It is an amenable number.

1808135097 is a deficient number, since it is larger than the sum of its proper divisors (641898375).

1808135097 is a wasteful number, since it uses less digits than its factorization.

1808135097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11848.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 1808135097 is about 42522.1718283533. The cubic root of 1808135097 is about 1218.2702120503.

The spelling of 1808135097 in words is "one billion, eight hundred eight million, one hundred thirty-five thousand, ninety-seven".