13620149 has 2 divisors, whose sum is σ = 13620150. Its totient is φ = 13620148.

The previous prime is 13620133. The next prime is 13620151. The reversal of 13620149 is 94102631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7739524 + 5880625 = 2782^2 + 2425^2 .

It is a cyclic number.

It is not a de Polignac number, because 13620149 - 2⁴ = 13620133 is a prime.

Together with 13620151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13620119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6810074 + 6810075.

It is an arithmetic number, because the mean of its divisors is an integer number (6810075).

Almost surely, 2^13620149 is an apocalyptic number.

It is an amenable number.

13620149 is a deficient number, since it is larger than the sum of its proper divisors (1).

13620149 is an equidigital number, since it uses as much as digits as its factorization.

13620149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 13620149 is about 3690.5486042051. The cubic root of 13620149 is about 238.8144600854.

The spelling of 13620149 in words is "thirteen million, six hundred twenty thousand, one hundred forty-nine".