133890723 has 12 divisors (see below), whose sum is σ = 196285128. Its totient is φ = 87927840.

The previous prime is 133890721. The next prime is 133890727. The reversal of 133890723 is 327098331.

It is a happy number.

It is not a de Polignac number, because 133890723 - 2¹ = 133890721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133890721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110418 + ... + 111623.

It is an arithmetic number, because the mean of its divisors is an integer number (16357094).

Almost surely, 2^133890723 is an apocalyptic number.

133890723 is a deficient number, since it is larger than the sum of its proper divisors (62394405).

133890723 is a wasteful number, since it uses less digits than its factorization.

133890723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222114 (or 222111 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 133890723 is about 11571.1158926009. The cubic root of 133890723 is about 511.5838534937.

The spelling of 133890723 in words is "one hundred thirty-three million, eight hundred ninety thousand, seven hundred twenty-three".