2149669 has 4 divisors (see below), whose sum is σ = 2176960. Its totient is φ = 2122380.

The previous prime is 2149661. The next prime is 2149681. The reversal of 2149669 is 9669412.

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 2149669 - 2³ = 2149661 is a prime.

It is a super-2 number, since 2×2149669² = 9242153619122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149661) 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, 13527 + ... + 13684.

It is an arithmetic number, because the mean of its divisors is an integer number (544240).

2^2149669 is an apocalyptic number.

It is an amenable number.

2149669 is a deficient number, since it is larger than the sum of its proper divisors (27291).

2149669 is an equidigital number, since it uses as much as digits as its factorization.

2149669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27290.

The product of its digits is 23328, while the sum is 37.

The square root of 2149669 is about 1466.1749554538. The cubic root of 2149669 is about 129.0596643257.

The spelling of 2149669 in words is "two million, one hundred forty-nine thousand, six hundred sixty-nine".