136997771 has 16 divisors (see below), whose sum is σ = 147571200. Its totient is φ = 126798048.

The previous prime is 136997767. The next prime is 136997801. The reversal of 136997771 is 177799631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 136997771 - 2² = 136997767 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136997071) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 160181 + ... + 161033.

It is an arithmetic number, because the mean of its divisors is an integer number (9223200).

Almost surely, 2^136997771 is an apocalyptic number.

136997771 is a deficient number, since it is larger than the sum of its proper divisors (10573429).

136997771 is a wasteful number, since it uses less digits than its factorization.

136997771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058.

The product of its digits is 500094, while the sum is 50.

The square root of 136997771 is about 11704.6046921714. The cubic root of 136997771 is about 515.5108777174.

The spelling of 136997771 in words is "one hundred thirty-six million, nine hundred ninety-seven thousand, seven hundred seventy-one".