1979371 has 2 divisors, whose sum is σ = 1979372. Its totient is φ = 1979370.

The previous prime is 1979359. The next prime is 1979387. The reversal of 1979371 is 1739791.

It is a weak prime.

It is an emirp because it is prime and its reverse (1739791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1979371 - 2⁵ = 1979339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1979371.

It is not a weakly prime, because it can be changed into another prime (1979321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989685 + 989686.

It is an arithmetic number, because the mean of its divisors is an integer number (989686).

2^1979371 is an apocalyptic number.

1979371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979371 is an equidigital number, since it uses as much as digits as its factorization.

1979371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11907, while the sum is 37.

The square root of 1979371 is about 1406.9012047759. The cubic root of 1979371 is about 125.5574251889.

The spelling of 1979371 in words is "one million, nine hundred seventy-nine thousand, three hundred seventy-one".