2373981 has 8 divisors (see below), whose sum is σ = 3188640. Its totient is φ = 1570992.

The previous prime is 2373979. The next prime is 2373989. The reversal of 2373981 is 1893732.

2373981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2373981 - 2¹ = 2373979 is a prime.

It is a super-2 number, since 2×2373981² = 11271571576722, which contains 22 as substring.

2373981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2373989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2430 + ... + 3263.

It is an arithmetic number, because the mean of its divisors is an integer number (398580).

2^2373981 is an apocalyptic number.

It is an amenable number.

2373981 is a deficient number, since it is larger than the sum of its proper divisors (814659).

2373981 is a wasteful number, since it uses less digits than its factorization.

2373981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835.

The product of its digits is 9072, while the sum is 33.

The square root of 2373981 is about 1540.7728580164. The cubic root of 2373981 is about 133.4009982940.

Subtracting from 2373981 its reverse (1893732), we obtain a square (480249 = 693²).

The spelling of 2373981 in words is "two million, three hundred seventy-three thousand, nine hundred eighty-one".