13690087 has 2 divisors, whose sum is σ = 13690088. Its totient is φ = 13690086.

The previous prime is 13690031. The next prime is 13690091. The reversal of 13690087 is 78009631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13690087 - 2⁷ = 13689959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13690097) 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, 6845043 + 6845044.

It is an arithmetic number, because the mean of its divisors is an integer number (6845044).

Almost surely, 2^13690087 is an apocalyptic number.

13690087 is a deficient number, since it is larger than the sum of its proper divisors (1).

13690087 is an equidigital number, since it uses as much as digits as its factorization.

13690087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 13690087 is about 3700.0117567381. The cubic root of 13690087 is about 239.2225246124. Note that the first 3 decimals are identical.

The spelling of 13690087 in words is "thirteen million, six hundred ninety thousand, eighty-seven".