136997461 has 2 divisors, whose sum is σ = 136997462. Its totient is φ = 136997460.

The previous prime is 136997459. The next prime is 136997473. The reversal of 136997461 is 164799631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132020100 + 4977361 = 11490^2 + 2231^2 .

It is a cyclic number.

It is not a de Polignac number, because 136997461 - 2¹ = 136997459 is a prime.

Together with 136997459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136997431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68498730 + 68498731.

It is an arithmetic number, because the mean of its divisors is an integer number (68498731).

Almost surely, 2^136997461 is an apocalyptic number.

It is an amenable number.

136997461 is a deficient number, since it is larger than the sum of its proper divisors (1).

136997461 is an equidigital number, since it uses as much as digits as its factorization.

136997461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 136997461 is about 11704.5914495125. The cubic root of 136997461 is about 515.5104888826.

The spelling of 136997461 in words is "one hundred thirty-six million, nine hundred ninety-seven thousand, four hundred sixty-one".