133897398 has 32 divisors (see below), whose sum is σ = 284726016. Its totient is φ = 41884128.

The previous prime is 133897397. The next prime is 133897441. The reversal of 133897398 is 893798331.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 133897398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133897397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1840 + ... + 16467.

It is an arithmetic number, because the mean of its divisors is an integer number (8897688).

Almost surely, 2^133897398 is an apocalyptic number.

133897398 is an abundant number, since it is smaller than the sum of its proper divisors (150828618).

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

133897398 is a wasteful number, since it uses less digits than its factorization.

133897398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18388.

The product of its digits is 979776, while the sum is 51.

The square root of 133897398 is about 11571.4043227259. The cubic root of 133897398 is about 511.5923548681.

The spelling of 133897398 in words is "one hundred thirty-three million, eight hundred ninety-seven thousand, three hundred ninety-eight".