4155979 has 4 divisors (see below), whose sum is σ = 4180176. Its totient is φ = 4131784.

The previous prime is 4155929. The next prime is 4155989. The reversal of 4155979 is 9795514.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9795514 = 2 ⋅4897757.

It is a cyclic number.

It is not a de Polignac number, because 4155979 - 2⁹ = 4155467 is a prime.

It is a super-2 number, since 2×4155979² = 34544322896882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4155919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11839 + ... + 12184.

It is an arithmetic number, because the mean of its divisors is an integer number (1045044).

Almost surely, 2^4155979 is an apocalyptic number.

4155979 is a deficient number, since it is larger than the sum of its proper divisors (24197).

4155979 is a wasteful number, since it uses less digits than its factorization.

4155979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24196.

The product of its digits is 56700, while the sum is 40.

The square root of 4155979 is about 2038.6218383997. The cubic root of 4155979 is about 160.7771952470. Note that the first 3 decimals are identical.

The spelling of 4155979 in words is "four million, one hundred fifty-five thousand, nine hundred seventy-nine".