136139870 has 8 divisors (see below), whose sum is σ = 245051784. Its totient is φ = 54455944.

The previous prime is 136139867. The next prime is 136139911. The reversal of 136139870 is 78931631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6806984 + ... + 6807003.

It is an arithmetic number, because the mean of its divisors is an integer number (30631473).

Almost surely, 2^136139870 is an apocalyptic number.

136139870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136139870 is a deficient number, since it is larger than the sum of its proper divisors (108911914).

136139870 is a wasteful number, since it uses less digits than its factorization.

136139870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13613994.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 136139870 is about 11667.8991253781. The cubic root of 136139870 is about 514.4325543735.

The spelling of 136139870 in words is "one hundred thirty-six million, one hundred thirty-nine thousand, eight hundred seventy".