133988465 has 8 divisors (see below), whose sum is σ = 173154408. Its totient is φ = 98945280.

The previous prime is 133988443. The next prime is 133988467. The reversal of 133988465 is 564889331.

It can be written as a sum of positive squares in 4 ways, for example, as 3389281 + 130599184 = 1841^2 + 11428^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-133988465 is a prime.

It is a super-3 number, since 3×133988465³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133988467) 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, 1030616 + ... + 1030745.

It is an arithmetic number, because the mean of its divisors is an integer number (21644301).

Almost surely, 2^133988465 is an apocalyptic number.

It is an amenable number.

133988465 is a deficient number, since it is larger than the sum of its proper divisors (39165943).

133988465 is a wasteful number, since it uses less digits than its factorization.

133988465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061379.

The product of its digits is 622080, while the sum is 47.

The square root of 133988465 is about 11575.3386559530. The cubic root of 133988465 is about 511.7083108750.

The spelling of 133988465 in words is "one hundred thirty-three million, nine hundred eighty-eight thousand, four hundred sixty-five".