3799981 has 4 divisors (see below), whose sum is σ = 4000000. Its totient is φ = 3599964.

The previous prime is 3799973. The next prime is 3800021. The reversal of 3799981 is 1899973.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1899973 = 421 ⋅4513.

It is a cyclic number.

It is not a de Polignac number, because 3799981 - 2³ = 3799973 is a prime.

It is a super-2 number, since 2×3799981² = 28879711200722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3799931) 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, 99981 + ... + 100018.

It is an arithmetic number, because the mean of its divisors is an integer number (1000000).

Almost surely, 2^3799981 is an apocalyptic number.

It is an amenable number.

3799981 is a deficient number, since it is larger than the sum of its proper divisors (200019).

3799981 is a wasteful number, since it uses less digits than its factorization.

3799981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200018.

The product of its digits is 122472, while the sum is 46.

The square root of 3799981 is about 1949.3539955585. The cubic root of 3799981 is about 156.0488149886.

The spelling of 3799981 in words is "three million, seven hundred ninety-nine thousand, nine hundred eighty-one".