136205091 has 32 divisors (see below), whose sum is σ = 231724800. Its totient is φ = 78200640.

The previous prime is 136205089. The next prime is 136205101. The reversal of 136205091 is 190502631.

136205091 is a `hidden beast` number, since 136 + 20 + 509 + 1 = 666.

It is not a de Polignac number, because 136205091 - 2¹ = 136205089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (136205021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6426 + ... + 17711.

It is an arithmetic number, because the mean of its divisors is an integer number (7241400).

Almost surely, 2^136205091 is an apocalyptic number.

136205091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136205091 is a deficient number, since it is larger than the sum of its proper divisors (95519709).

136205091 is a wasteful number, since it uses less digits than its factorization.

136205091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24176 (or 24170 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 136205091 is about 11670.6936811828. The cubic root of 136205091 is about 514.5146915881.

The spelling of 136205091 in words is "one hundred thirty-six million, two hundred five thousand, ninety-one".