133867783 has 4 divisors (see below), whose sum is σ = 152991760. Its totient is φ = 114743808.

The previous prime is 133867759. The next prime is 133867793. The reversal of 133867783 is 387768331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 387768331 = 4933 ⋅78607.

It is a cyclic number.

It is not a de Polignac number, because 133867783 - 2¹³ = 133859591 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 (133867753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9561978 + ... + 9561991.

It is an arithmetic number, because the mean of its divisors is an integer number (38247940).

Almost surely, 2^133867783 is an apocalyptic number.

133867783 is a deficient number, since it is larger than the sum of its proper divisors (19123977).

133867783 is an equidigital number, since it uses as much as digits as its factorization.

133867783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19123976.

The product of its digits is 508032, while the sum is 46.

The square root of 133867783 is about 11570.1245887847. The cubic root of 133867783 is about 511.5546346312.

The spelling of 133867783 in words is "one hundred thirty-three million, eight hundred sixty-seven thousand, seven hundred eighty-three".