136994973 has 4 divisors (see below), whose sum is σ = 182659968. Its totient is φ = 91329980.

The previous prime is 136994951. The next prime is 136994987. The reversal of 136994973 is 379499631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136994973 - 2¹² = 136990877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136994933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22832493 + ... + 22832498.

It is an arithmetic number, because the mean of its divisors is an integer number (45664992).

Almost surely, 2^136994973 is an apocalyptic number.

It is an amenable number.

136994973 is a deficient number, since it is larger than the sum of its proper divisors (45664995).

136994973 is an equidigital number, since it uses as much as digits as its factorization.

136994973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45664994.

The product of its digits is 1102248, while the sum is 51.

The square root of 136994973 is about 11704.4851659524. The cubic root of 136994973 is about 515.5073681487.

The spelling of 136994973 in words is "one hundred thirty-six million, nine hundred ninety-four thousand, nine hundred seventy-three".