2123977 has 4 divisors (see below), whose sum is σ = 2169216. Its totient is φ = 2078740.

The previous prime is 2123971. The next prime is 2123983. The reversal of 2123977 is 7793212.

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 an interprime number because it is at equal distance from previous prime (2123971) and next prime (2123983).

It is a cyclic number.

It is not a de Polignac number, because 2123977 - 2³ = 2123969 is a prime.

It is a super-2 number, since 2×2123977² = 9022556593058, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123971) 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, 22549 + ... + 22642.

It is an arithmetic number, because the mean of its divisors is an integer number (542304).

2^2123977 is an apocalyptic number.

It is an amenable number.

2123977 is a deficient number, since it is larger than the sum of its proper divisors (45239).

2123977 is an equidigital number, since it uses as much as digits as its factorization.

2123977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45238.

The product of its digits is 5292, while the sum is 31.

The square root of 2123977 is about 1457.3870453658. The cubic root of 2123977 is about 128.5434454679.

It can be divided in two parts, 21239 and 77, that added together give a square (21316 = 146²).

The spelling of 2123977 in words is "two million, one hundred twenty-three thousand, nine hundred seventy-seven".