138033787 has 4 divisors (see below), whose sum is σ = 144035280. Its totient is φ = 132032296.

The previous prime is 138033769. The next prime is 138033799. The reversal of 138033787 is 787330831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138033787 is a prime.

It is a super-2 number, since 2×138033787² = 38106652707122738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138033737) 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, 3000712 + ... + 3000757.

It is an arithmetic number, because the mean of its divisors is an integer number (36008820).

Almost surely, 2^138033787 is an apocalyptic number.

138033787 is a deficient number, since it is larger than the sum of its proper divisors (6001493).

138033787 is an equidigital number, since it uses as much as digits as its factorization.

138033787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001492.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 138033787 is about 11748.7781066799. The cubic root of 138033787 is about 516.8070955547.

The spelling of 138033787 in words is "one hundred thirty-eight million, thirty-three thousand, seven hundred eighty-seven".