136463021 has 2 divisors, whose sum is σ = 136463022. Its totient is φ = 136463020.

The previous prime is 136463017. The next prime is 136463051. The reversal of 136463021 is 120364631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108784900 + 27678121 = 10430^2 + 5261^2 .

It is a cyclic number.

It is not a de Polignac number, because 136463021 - 2² = 136463017 is a prime.

It is a super-2 number, since 2×136463021² = 37244312200892882, which contains 22 as substring.

It is a Chen prime.

It is equal to p_7723502 and since 136463021 and 7723502 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136463011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68231510 + 68231511.

It is an arithmetic number, because the mean of its divisors is an integer number (68231511).

Almost surely, 2^136463021 is an apocalyptic number.

It is an amenable number.

136463021 is a deficient number, since it is larger than the sum of its proper divisors (1).

136463021 is an equidigital number, since it uses as much as digits as its factorization.

136463021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 136463021 is about 11681.7387832463. The cubic root of 136463021 is about 514.8392636281.

The spelling of 136463021 in words is "one hundred thirty-six million, four hundred sixty-three thousand, twenty-one".