2195977 has 4 divisors (see below), whose sum is σ = 2509696. Its totient is φ = 1882260.

The previous prime is 2195969. The next prime is 2195989. The reversal of 2195977 is 7795912.

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 2195977 - 2³ = 2195969 is a prime.

It is an Ulam number.

2195977 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2195917) 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, 156849 + ... + 156862.

It is an arithmetic number, because the mean of its divisors is an integer number (627424).

2^2195977 is an apocalyptic number.

It is an amenable number.

2195977 is a deficient number, since it is larger than the sum of its proper divisors (313719).

2195977 is an equidigital number, since it uses as much as digits as its factorization.

2195977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313718.

The product of its digits is 39690, while the sum is 40.

The square root of 2195977 is about 1481.8829238506. The cubic root of 2195977 is about 129.9798193526.

The spelling of 2195977 in words is "two million, one hundred ninety-five thousand, nine hundred seventy-seven".