2091372605 has 16 divisors (see below), whose sum is σ = 2871571584. Its totient is φ = 1432382400.

The previous prime is 2091372551. The next prime is 2091372631. The reversal of 2091372605 is 5062731902.

It is a de Polignac number, because none of the positive numbers 2^k-2091372605 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5171 + ... + 64880.

It is an arithmetic number, because the mean of its divisors is an integer number (179473224).

Almost surely, 2^2091372605 is an apocalyptic number.

It is an amenable number.

2091372605 is a deficient number, since it is larger than the sum of its proper divisors (780198979).

2091372605 is an equidigital number, since it uses as much as digits as its factorization.

2091372605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70916.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 2091372605 is about 45731.5274728496. The cubic root of 2091372605 is about 1278.8230972994.

The spelling of 2091372605 in words is "two billion, ninety-one million, three hundred seventy-two thousand, six hundred five".