1979381 has 8 divisors (see below), whose sum is σ = 2075904. Its totient is φ = 1884960.

The previous prime is 1979371. The next prime is 1979387. The reversal of 1979381 is 1839791.

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

It is a cyclic number.

It is not a de Polignac number, because 1979381 - 2⁶ = 1979317 is a prime.

It is a super-2 number, since 2×1979381² = 7835898286322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1601 + ... + 2553.

It is an arithmetic number, because the mean of its divisors is an integer number (259488).

2^1979381 is an apocalyptic number.

It is an amenable number.

1979381 is a deficient number, since it is larger than the sum of its proper divisors (96523).

1979381 is an equidigital number, since it uses as much as digits as its factorization.

1979381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051.

The product of its digits is 13608, while the sum is 38.

The square root of 1979381 is about 1406.9047586813. The cubic root of 1979381 is about 125.5576366319.

The spelling of 1979381 in words is "one million, nine hundred seventy-nine thousand, three hundred eighty-one".