133902979 has 4 divisors (see below), whose sum is σ = 153031984. Its totient is φ = 114773976.

The previous prime is 133902973. The next prime is 133903039. The reversal of 133902979 is 979209331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979209331 = 29 ⋅33765839.

It is a cyclic number.

It is not a de Polignac number, because 133902979 - 2¹⁵ = 133870211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133902973) 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, 9564492 + ... + 9564505.

It is an arithmetic number, because the mean of its divisors is an integer number (38257996).

Almost surely, 2^133902979 is an apocalyptic number.

133902979 is a deficient number, since it is larger than the sum of its proper divisors (19129005).

133902979 is an equidigital number, since it uses as much as digits as its factorization.

133902979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19129004.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 133902979 is about 11571.6454750394. The cubic root of 133902979 is about 511.5994626917.

The spelling of 133902979 in words is "one hundred thirty-three million, nine hundred two thousand, nine hundred seventy-nine".