133784690 has 16 divisors (see below), whose sum is σ = 259336728. Its totient is φ = 49397376.

The previous prime is 133784689. The next prime is 133784723. The reversal of 133784690 is 96487331.

It can be written as a sum of positive squares in 4 ways, for example, as 111872929 + 21911761 = 10577^2 + 4681^2 .

It is a super-2 number, since 2×133784690² = 35796686556792200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514427 + ... + 514686.

Almost surely, 2^133784690 is an apocalyptic number.

133784690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133784690 is a deficient number, since it is larger than the sum of its proper divisors (125552038).

133784690 is a wasteful number, since it uses less digits than its factorization.

133784690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029133.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 133784690 is about 11566.5331884710. The cubic root of 133784690 is about 511.4487704566.

The spelling of 133784690 in words is "one hundred thirty-three million, seven hundred eighty-four thousand, six hundred ninety".