133720690 has 32 divisors (see below), whose sum is σ = 245255040. Its totient is φ = 52483200.

The previous prime is 133720673. The next prime is 133720703. The reversal of 133720690 is 96027331.

133720690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×133720690² = 35762445868152200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234726 + ... + 235294.

It is an arithmetic number, because the mean of its divisors is an integer number (7664220).

Almost surely, 2^133720690 is an apocalyptic number.

133720690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133720690 is a deficient number, since it is larger than the sum of its proper divisors (111534350).

133720690 is a wasteful number, since it uses less digits than its factorization.

133720690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 133720690 is about 11563.7662549880. The cubic root of 133720690 is about 511.3672017254.

The spelling of 133720690 in words is "one hundred thirty-three million, seven hundred twenty thousand, six hundred ninety".