133897424 has 10 divisors (see below), whose sum is σ = 259426290. Its totient is φ = 66948704.

The previous prime is 133897397. The next prime is 133897441. The reversal of 133897424 is 424798331.

It can be written as a sum of positive squares in only one way, i.e., 108576400 + 25321024 = 10420^2 + 5032^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4184279 + ... + 4184310.

It is an arithmetic number, because the mean of its divisors is an integer number (25942629).

Almost surely, 2^133897424 is an apocalyptic number.

It is an amenable number.

133897424 is a deficient number, since it is larger than the sum of its proper divisors (125528866).

133897424 is an equidigital number, since it uses as much as digits as its factorization.

133897424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368597 (or 8368591 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 133897424 is about 11571.4054461850. The cubic root of 133897424 is about 511.5923879815.

The spelling of 133897424 in words is "one hundred thirty-three million, eight hundred ninety-seven thousand, four hundred twenty-four".