133942686 has 16 divisors (see below), whose sum is σ = 270896400. Its totient is φ = 44145728.

The previous prime is 133942681. The next prime is 133942691. The reversal of 133942686 is 686249331.

It is an interprime number because it is at equal distance from previous prime (133942681) and next prime (133942691).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133942681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124881 + ... + 125948.

It is an arithmetic number, because the mean of its divisors is an integer number (16931025).

Almost surely, 2^133942686 is an apocalyptic number.

133942686 is an abundant number, since it is smaller than the sum of its proper divisors (136953714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133942686 is a wasteful number, since it uses less digits than its factorization.

133942686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250923.

The product of its digits is 186624, while the sum is 42.

The square root of 133942686 is about 11573.3610502740. The cubic root of 133942686 is about 511.6500268450.

The spelling of 133942686 in words is "one hundred thirty-three million, nine hundred forty-two thousand, six hundred eighty-six".