136121997 has 8 divisors (see below), whose sum is σ = 197995680. Its totient is φ = 82498160.

The previous prime is 136121963. The next prime is 136122013. The reversal of 136121997 is 799121631.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136121997 - 2⁶ = 136121933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136121197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2062422 + ... + 2062487.

It is an arithmetic number, because the mean of its divisors is an integer number (24749460).

Almost surely, 2^136121997 is an apocalyptic number.

It is an amenable number.

136121997 is a deficient number, since it is larger than the sum of its proper divisors (61873683).

136121997 is a wasteful number, since it uses less digits than its factorization.

136121997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124923.

The product of its digits is 20412, while the sum is 39.

The square root of 136121997 is about 11667.1331954341. The cubic root of 136121997 is about 514.4100411170.

The spelling of 136121997 in words is "one hundred thirty-six million, one hundred twenty-one thousand, nine hundred ninety-seven".