138378005 has 8 divisors (see below), whose sum is σ = 173273472. Its totient is φ = 105889168.

The previous prime is 138377989. The next prime is 138378013. The reversal of 138378005 is 500873831.

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 138378005 - 2⁴ = 138377989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601529 + ... + 601758.

It is an arithmetic number, because the mean of its divisors is an integer number (21659184).

Almost surely, 2^138378005 is an apocalyptic number.

It is an amenable number.

138378005 is a deficient number, since it is larger than the sum of its proper divisors (34895467).

138378005 is a wasteful number, since it uses less digits than its factorization.

138378005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203315.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 138378005 is about 11763.4180831933. The cubic root of 138378005 is about 517.2363301650.

The spelling of 138378005 in words is "one hundred thirty-eight million, three hundred seventy-eight thousand, five".