134906990391 has 6 divisors (see below), whose sum is σ = 194865652800. Its totient is φ = 89937993588.

The previous prime is 134906990371. The next prime is 134906990401. The reversal of 134906990391 is 193099609431.

134906990391 is a `hidden beast` number, since 1 + 3 + 490 + 69 + 9 + 0 + 3 + 91 = 666.

It is not a de Polignac number, because 134906990391 - 2¹⁸ = 134906728247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134906990371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7494832791 + ... + 7494832808.

It is an arithmetic number, because the mean of its divisors is an integer number (32477608800).

Almost surely, 2^134906990391 is an apocalyptic number.

134906990391 is a deficient number, since it is larger than the sum of its proper divisors (59958662409).

134906990391 is a wasteful number, since it uses less digits than its factorization.

134906990391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14989665605 (or 14989665602 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 54.

The spelling of 134906990391 in words is "one hundred thirty-four billion, nine hundred six million, nine hundred ninety thousand, three hundred ninety-one".