133401839 has 16 divisors (see below), whose sum is σ = 145152000. Its totient is φ = 122120064.

The previous prime is 133401809. The next prime is 133401881. The reversal of 133401839 is 938104331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 133401839 - 2¹⁶ = 133336303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133401809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158582 + ... + 159420.

It is an arithmetic number, because the mean of its divisors is an integer number (9072000).

Almost surely, 2^133401839 is an apocalyptic number.

133401839 is a deficient number, since it is larger than the sum of its proper divisors (11750161).

133401839 is a wasteful number, since it uses less digits than its factorization.

133401839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 133401839 is about 11549.9713852459. The cubic root of 133401839 is about 510.9604341796.

The spelling of 133401839 in words is "one hundred thirty-three million, four hundred one thousand, eight hundred thirty-nine".