1401979 has 2 divisors, whose sum is σ = 1401980. Its totient is φ = 1401978.

The previous prime is 1401977. The next prime is 1401989. The reversal of 1401979 is 9791041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1401979 - 2¹ = 1401977 is a prime.

Together with 1401977, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1401979.

It is not a weakly prime, because it can be changed into another prime (1401971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700989 + 700990.

It is an arithmetic number, because the mean of its divisors is an integer number (700990).

2^1401979 is an apocalyptic number.

1401979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401979 is an equidigital number, since it uses as much as digits as its factorization.

1401979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 1401979 is about 1184.0519414282. The cubic root of 1401979 is about 111.9215809480.

The spelling of 1401979 in words is "one million, four hundred one thousand, nine hundred seventy-nine".