133761881 has 8 divisors (see below), whose sum is σ = 153602400. Its totient is φ = 115201440.

The previous prime is 133761853. The next prime is 133761893. The reversal of 133761881 is 188167331.

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 133761881 - 2²² = 129567577 is a prime.

It is a super-2 number, since 2×133761881² = 35784481617316322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133761841) 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, 319796 + ... + 320213.

It is an arithmetic number, because the mean of its divisors is an integer number (19200300).

Almost surely, 2^133761881 is an apocalyptic number.

133761881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133761881 is a deficient number, since it is larger than the sum of its proper divisors (19840519).

133761881 is a wasteful number, since it uses less digits than its factorization.

133761881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640039.

The product of its digits is 24192, while the sum is 38.

The square root of 133761881 is about 11565.5471552365. The cubic root of 133761881 is about 511.4197031096.

It can be divided in two parts, 13376 and 1881, that multiplied together give a square (25160256 = 5016²).

The spelling of 133761881 in words is "one hundred thirty-three million, seven hundred sixty-one thousand, eight hundred eighty-one".