1001979 has 24 divisors (see below), whose sum is σ = 1638000. Its totient is φ = 584640.

The previous prime is 1001977. The next prime is 1001981. The reversal of 1001979 is 9791001.

It is an interprime number because it is at equal distance from previous prime (1001977) and next prime (1001981).

It is not a de Polignac number, because 1001979 - 2¹ = 1001977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2697 + ... + 3045.

It is an arithmetic number, because the mean of its divisors is an integer number (68250).

2^1001979 is an apocalyptic number.

1001979 is a deficient number, since it is larger than the sum of its proper divisors (636021).

1001979 is a wasteful number, since it uses less digits than its factorization.

1001979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 27.

The square root of 1001979 is about 1000.9890109287. The cubic root of 1001979 is about 100.0659231984.

It can be divided in two parts, 1001 and 979, that multiplied together give a palindrome (979979).

The spelling of 1001979 in words is "one million, one thousand, nine hundred seventy-nine".