2779225987 has 4 divisors (see below), whose sum is σ = 2780355016. Its totient is φ = 2778096960.

The previous prime is 2779225973. The next prime is 2779225993. The reversal of 2779225987 is 7895229772.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2779225987 - 2¹¹ = 2779223939 is a prime.

It is a super-2 number, since 2×2779225987² = 15448194173632248338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2779225187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560814 + ... + 565747.

It is an arithmetic number, because the mean of its divisors is an integer number (695088754).

Almost surely, 2^2779225987 is an apocalyptic number.

2779225987 is a deficient number, since it is larger than the sum of its proper divisors (1129029).

2779225987 is a wasteful number, since it uses less digits than its factorization.

2779225987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129028.

The product of its digits is 8890560, while the sum is 58.

The square root of 2779225987 is about 52718.3647982371. The cubic root of 2779225987 is about 1405.9653597868.

The spelling of 2779225987 in words is "two billion, seven hundred seventy-nine million, two hundred twenty-five thousand, nine hundred eighty-seven".