13963021 has 2 divisors, whose sum is σ = 13963022. Its totient is φ = 13963020.

The previous prime is 13962979. The next prime is 13963049. The reversal of 13963021 is 12036931.

13963021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13616100 + 346921 = 3690^2 + 589^2 .

It is a cyclic number.

It is not a de Polignac number, because 13963021 - 2²¹ = 11865869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13963091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6981510 + 6981511.

It is an arithmetic number, because the mean of its divisors is an integer number (6981511).

Almost surely, 2^13963021 is an apocalyptic number.

It is an amenable number.

13963021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13963021 is an equidigital number, since it uses as much as digits as its factorization.

13963021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 13963021 is about 3736.7125926408. The cubic root of 13963021 is about 240.8018377600.

Adding to 13963021 its reverse (12036931), we get a palindrome (25999952).

The spelling of 13963021 in words is "thirteen million, nine hundred sixty-three thousand, twenty-one".