2621979 has 6 divisors (see below), whose sum is σ = 3787316. Its totient is φ = 1747980.

The previous prime is 2621951. The next prime is 2621987. The reversal of 2621979 is 9791262.

It is not a de Polignac number, because 2621979 - 2⁵ = 2621947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2621929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 145657 + ... + 145674.

2^2621979 is an apocalyptic number.

2621979 is a deficient number, since it is larger than the sum of its proper divisors (1165337).

2621979 is a wasteful number, since it uses less digits than its factorization.

2621979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291337 (or 291334 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 2621979 is about 1619.2526053708. The cubic root of 2621979 is about 137.8932697122.

It can be divided in two parts, 2621 and 979, that added together give a square (3600 = 60²).

The spelling of 2621979 in words is "two million, six hundred twenty-one thousand, nine hundred seventy-nine".