11720979 has 6 divisors (see below), whose sum is σ = 16930316. Its totient is φ = 7813980.

The previous prime is 11720977. The next prime is 11720981. The reversal of 11720979 is 97902711.

11720979 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11720977) and next prime (11720981).

It is not a de Polignac number, because 11720979 - 2¹ = 11720977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11720977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 651157 + ... + 651174.

Almost surely, 2^11720979 is an apocalyptic number.

11720979 is a deficient number, since it is larger than the sum of its proper divisors (5209337).

11720979 is a wasteful number, since it uses less digits than its factorization.

11720979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302337 (or 1302334 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 11720979 is about 3423.5915352156. The cubic root of 11720979 is about 227.1544744774.

The spelling of 11720979 in words is "eleven million, seven hundred twenty thousand, nine hundred seventy-nine".