663936149 has 2 divisors, whose sum is σ = 663936150. Its totient is φ = 663936148.

The previous prime is 663936131. The next prime is 663936197. The reversal of 663936149 is 941639366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 477422500 + 186513649 = 21850^2 + 13657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663936149 is a prime.

It is a super-2 number, since 2×663936149² = 881622419897900402, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663936109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331968074 + 331968075.

It is an arithmetic number, because the mean of its divisors is an integer number (331968075).

Almost surely, 2^663936149 is an apocalyptic number.

It is an amenable number.

663936149 is a deficient number, since it is larger than the sum of its proper divisors (1).

663936149 is an equidigital number, since it uses as much as digits as its factorization.

663936149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 47.

The square root of 663936149 is about 25766.9584739837. The cubic root of 663936149 is about 872.3861692807.

The spelling of 663936149 in words is "six hundred sixty-three million, nine hundred thirty-six thousand, one hundred forty-nine".