136888903447 has 4 divisors (see below), whose sum is σ = 139471713000. Its totient is φ = 134306093896.

The previous prime is 136888903439. The next prime is 136888903469. The reversal of 136888903447 is 744309888631.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 136888903447 - 2³ = 136888903439 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 (136888903427) 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, 1291404697 + ... + 1291404802.

It is an arithmetic number, because the mean of its divisors is an integer number (34867928250).

Almost surely, 2^136888903447 is an apocalyptic number.

136888903447 is a deficient number, since it is larger than the sum of its proper divisors (2582809553).

136888903447 is an equidigital number, since it uses as much as digits as its factorization.

136888903447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582809552.

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 136888903447 in words is "one hundred thirty-six billion, eight hundred eighty-eight million, nine hundred three thousand, four hundred forty-seven".