27790969 has 4 divisors (see below), whose sum is σ = 28999296. Its totient is φ = 26582644.

The previous prime is 27790963. The next prime is 27790979. The reversal of 27790969 is 96909772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27790969 - 2⁹ = 27790457 is a prime.

It is a super-2 number, since 2×27790969² = 1544675915917922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27790963) 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, 604129 + ... + 604174.

It is an arithmetic number, because the mean of its divisors is an integer number (7249824).

Almost surely, 2^27790969 is an apocalyptic number.

It is an amenable number.

27790969 is a deficient number, since it is larger than the sum of its proper divisors (1208327).

27790969 is a wasteful number, since it uses less digits than its factorization.

27790969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208326.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 27790969 is about 5271.7140476319. The cubic root of 27790969 is about 302.9013646351.

The spelling of 27790969 in words is "twenty-seven million, seven hundred ninety thousand, nine hundred sixty-nine".