133139895 has 16 divisors (see below), whose sum is σ = 243456000. Its totient is φ = 60863904.

The previous prime is 133139891. The next prime is 133139953. The reversal of 133139895 is 598931331.

It is a happy number.

It is not a de Polignac number, because 133139895 - 2² = 133139891 is a prime.

It is a super-2 number, since 2×133139895² = 35452463281222050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133139891) 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, 633895 + ... + 634104.

It is an arithmetic number, because the mean of its divisors is an integer number (15216000).

Almost surely, 2^133139895 is an apocalyptic number.

133139895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133139895 is a deficient number, since it is larger than the sum of its proper divisors (110316105).

133139895 is a wasteful number, since it uses less digits than its factorization.

133139895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268014.

The product of its digits is 87480, while the sum is 42.

The square root of 133139895 is about 11538.6262180556. The cubic root of 133139895 is about 510.6257793250.

The spelling of 133139895 in words is "one hundred thirty-three million, one hundred thirty-nine thousand, eight hundred ninety-five".