133690738 has 4 divisors (see below), whose sum is σ = 200536110. Its totient is φ = 66845368.

The previous prime is 133690729. The next prime is 133690747. The reversal of 133690738 is 837096331.

133690738 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (133690729) and next prime (133690747).

It can be written as a sum of positive squares in only one way, i.e., 124612569 + 9078169 = 11163^2 + 3013^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 133690738.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33422683 + ... + 33422686.

Almost surely, 2^133690738 is an apocalyptic number.

133690738 is a deficient number, since it is larger than the sum of its proper divisors (66845372).

133690738 is an equidigital number, since it uses as much as digits as its factorization.

133690738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66845371.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 133690738 is about 11562.4711026666. The cubic root of 133690738 is about 511.3290186186.

The spelling of 133690738 in words is "one hundred thirty-three million, six hundred ninety thousand, seven hundred thirty-eight".