133973749 has 8 divisors (see below), whose sum is σ = 164890880. Its totient is φ = 106001136.

The previous prime is 133973711. The next prime is 133973759. The reversal of 133973749 is 947379331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133973749 - 2¹¹ = 133971701 is a prime.

It is a super-2 number, since 2×133973749² = 35897930842230002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133973699 and 133973708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133973759) 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, 736029 + ... + 736210.

It is an arithmetic number, because the mean of its divisors is an integer number (20611360).

Almost surely, 2^133973749 is an apocalyptic number.

It is an amenable number.

133973749 is a deficient number, since it is larger than the sum of its proper divisors (30917131).

133973749 is a wasteful number, since it uses less digits than its factorization.

133973749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472259.

The product of its digits is 428652, while the sum is 46.

The square root of 133973749 is about 11574.7029767506. The cubic root of 133973749 is about 511.6895764881.

The spelling of 133973749 in words is "one hundred thirty-three million, nine hundred seventy-three thousand, seven hundred forty-nine".