136197621 has 48 divisors (see below), whose sum is σ = 230164480. Its totient is φ = 76010400.

The previous prime is 136197619. The next prime is 136197661. The reversal of 136197621 is 126791631.

136197621 is a `hidden beast` number, since 13 + 6 + 19 + 7 + 621 = 666.

It is not a de Polignac number, because 136197621 - 2¹ = 136197619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136197661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 901896 + ... + 902046.

Almost surely, 2^136197621 is an apocalyptic number.

It is an amenable number.

136197621 is a deficient number, since it is larger than the sum of its proper divisors (93966859).

136197621 is a wasteful number, since it uses less digits than its factorization.

136197621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 403 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 136197621 is about 11670.3736444040. The cubic root of 136197621 is about 514.5052854418.

The spelling of 136197621 in words is "one hundred thirty-six million, one hundred ninety-seven thousand, six hundred twenty-one".