2149977 has 4 divisors (see below), whose sum is σ = 2866640. Its totient is φ = 1433316.

The previous prime is 2149937. The next prime is 2149991. The reversal of 2149977 is 7799412.

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 not a de Polignac number, because 2149977 - 2¹⁶ = 2084441 is a prime.

It is a super-2 number, since 2×2149977² = 9244802201058, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2149937) 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, 358327 + ... + 358332.

It is an arithmetic number, because the mean of its divisors is an integer number (716660).

2^2149977 is an apocalyptic number.

It is an amenable number.

2149977 is a deficient number, since it is larger than the sum of its proper divisors (716663).

2149977 is an equidigital number, since it uses as much as digits as its factorization.

2149977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716662.

The product of its digits is 31752, while the sum is 39.

The square root of 2149977 is about 1466.2799869056. The cubic root of 2149977 is about 129.0658278294.

The spelling of 2149977 in words is "two million, one hundred forty-nine thousand, nine hundred seventy-seven".