136623973 has 2 divisors, whose sum is σ = 136623974. Its totient is φ = 136623972.

The previous prime is 136623947. The next prime is 136624001. The reversal of 136623973 is 379326631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97160449 + 39463524 = 9857^2 + 6282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136623973 is a prime.

It is a super-2 number, since 2×136623973² = 37332219996609458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136623923) 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 as a sum of consecutive naturals, namely, 68311986 + 68311987.

It is an arithmetic number, because the mean of its divisors is an integer number (68311987).

Almost surely, 2^136623973 is an apocalyptic number.

It is an amenable number.

136623973 is a deficient number, since it is larger than the sum of its proper divisors (1).

136623973 is an equidigital number, since it uses as much as digits as its factorization.

136623973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 40.

The square root of 136623973 is about 11688.6257960463. The cubic root of 136623973 is about 515.0415940264.

The spelling of 136623973 in words is "one hundred thirty-six million, six hundred twenty-three thousand, nine hundred seventy-three".