13698649 has 2 divisors, whose sum is σ = 13698650. Its totient is φ = 13698648.

The previous prime is 13698611. The next prime is 13698673. The reversal of 13698649 is 94689631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13690000 + 8649 = 3700^2 + 93^2 .

It is a cyclic number.

It is not a de Polignac number, because 13698649 - 2¹¹ = 13696601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13698599 and 13698608.

It is not a weakly prime, because it can be changed into another prime (13698689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6849324 + 6849325.

It is an arithmetic number, because the mean of its divisors is an integer number (6849325).

Almost surely, 2^13698649 is an apocalyptic number.

It is an amenable number.

13698649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13698649 is an equidigital number, since it uses as much as digits as its factorization.

13698649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 46.

The square root of 13698649 is about 3701.1685992400. The cubic root of 13698649 is about 239.2723854206.

It can be divided in two parts, 1369 and 8649, that multiplied together give a square (11840481 = 3441²).

The spelling of 13698649 in words is "thirteen million, six hundred ninety-eight thousand, six hundred forty-nine".