133157747 has 4 divisors (see below), whose sum is σ = 133649376. Its totient is φ = 132666120.

The previous prime is 133157737. The next prime is 133157777. The reversal of 133157747 is 747751331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747751331 = 1181 ⋅633151.

It is a cyclic number.

It is not a de Polignac number, because 133157747 - 2⁶ = 133157683 is a prime.

It is a super-2 number, since 2×133157747² = 35461971172232018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133157747.

It is not an unprimeable number, because it can be changed into a prime (133157737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245408 + ... + 245949.

It is an arithmetic number, because the mean of its divisors is an integer number (33412344).

Almost surely, 2^133157747 is an apocalyptic number.

133157747 is a deficient number, since it is larger than the sum of its proper divisors (491629).

133157747 is an equidigital number, since it uses as much as digits as its factorization.

133157747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491628.

The product of its digits is 61740, while the sum is 38.

The square root of 133157747 is about 11539.3997677522. The cubic root of 133157747 is about 510.6486006439.

The spelling of 133157747 in words is "one hundred thirty-three million, one hundred fifty-seven thousand, seven hundred forty-seven".