2091620797 has 8 divisors (see below), whose sum is σ = 2415068096. Its totient is φ = 1774334592.

The previous prime is 2091620777. The next prime is 2091620803. The reversal of 2091620797 is 7970261902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2091620797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091620717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1539543 + ... + 1540900.

It is an arithmetic number, because the mean of its divisors is an integer number (301883512).

Almost surely, 2^2091620797 is an apocalyptic number.

It is an amenable number.

2091620797 is a deficient number, since it is larger than the sum of its proper divisors (323447299).

2091620797 is an equidigital number, since it uses as much as digits as its factorization.

2091620797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080547.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 2091620797 is about 45734.2409688846. The cubic root of 2091620797 is about 1278.8736830737.

The spelling of 2091620797 in words is "two billion, ninety-one million, six hundred twenty thousand, seven hundred ninety-seven".