133472779 has 4 divisors (see below), whose sum is σ = 145606680. Its totient is φ = 121338880.

The previous prime is 133472767. The next prime is 133472783. The reversal of 133472779 is 977274331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977274331 = 11 ⋅88843121.

It is a cyclic number.

It is not a de Polignac number, because 133472779 - 2⁵ = 133472747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133472719) 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, 6066934 + ... + 6066955.

It is an arithmetic number, because the mean of its divisors is an integer number (36401670).

Almost surely, 2^133472779 is an apocalyptic number.

133472779 is a deficient number, since it is larger than the sum of its proper divisors (12133901).

133472779 is a wasteful number, since it uses less digits than its factorization.

133472779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12133900.

The product of its digits is 222264, while the sum is 43.

The square root of 133472779 is about 11553.0419803617. The cubic root of 133472779 is about 511.0509904272.

The spelling of 133472779 in words is "one hundred thirty-three million, four hundred seventy-two thousand, seven hundred seventy-nine".