2623991697 has 6 divisors (see below), whose sum is σ = 3790210242. Its totient is φ = 1749327792.

The previous prime is 2623991663. The next prime is 2623991743. The reversal of 2623991697 is 7961993262.

2623991697 is a `hidden beast` number, since 2 + 623 + 9 + 9 + 1 + 6 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1950900561 + 673091136 = 44169^2 + 25944^2 .

It is not a de Polignac number, because 2623991697 - 2²⁸ = 2355556241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2623991627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 145777308 + ... + 145777325.

It is an arithmetic number, because the mean of its divisors is an integer number (631701707).

Almost surely, 2^2623991697 is an apocalyptic number.

It is an amenable number.

2623991697 is a deficient number, since it is larger than the sum of its proper divisors (1166218545).

2623991697 is a wasteful number, since it uses less digits than its factorization.

2623991697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291554639 (or 291554636 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 2623991697 is about 51224.9128549771. The cubic root of 2623991697 is about 1379.2854413473.

The spelling of 2623991697 in words is "two billion, six hundred twenty-three million, nine hundred ninety-one thousand, six hundred ninety-seven".