2131977 has 8 divisors (see below), whose sum is σ = 2919616. Its totient is φ = 1382832.

The previous prime is 2131951. The next prime is 2131979. The reversal of 2131977 is 7791312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2131977 - 2⁷ = 2131849 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9493 + ... + 9714.

It is an arithmetic number, because the mean of its divisors is an integer number (364952).

2^2131977 is an apocalyptic number.

It is an amenable number.

2131977 is a deficient number, since it is larger than the sum of its proper divisors (787639).

2131977 is a wasteful number, since it uses less digits than its factorization.

2131977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19247.

The product of its digits is 2646, while the sum is 30.

The square root of 2131977 is about 1460.1291038809. The cubic root of 2131977 is about 128.7046303837.

The spelling of 2131977 in words is "two million, one hundred thirty-one thousand, nine hundred seventy-seven".