136890785 has 16 divisors (see below), whose sum is σ = 167895504. Its totient is φ = 107108352.

The previous prime is 136890773. The next prime is 136890791. The reversal of 136890785 is 587098631.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3996001 + 132894784 = 1999^2 + 11528^2 .

It is a cyclic number.

It is not a de Polignac number, because 136890785 - 2¹² = 136886689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114149 + ... + 115341.

It is an arithmetic number, because the mean of its divisors is an integer number (10493469).

Almost surely, 2^136890785 is an apocalyptic number.

It is an amenable number.

136890785 is a deficient number, since it is larger than the sum of its proper divisors (31004719).

136890785 is a wasteful number, since it uses less digits than its factorization.

136890785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 136890785 is about 11700.0335469605. The cubic root of 136890785 is about 515.3766497189.

The spelling of 136890785 in words is "one hundred thirty-six million, eight hundred ninety thousand, seven hundred eighty-five".