1363506421 has 2 divisors, whose sum is σ = 1363506422. Its totient is φ = 1363506420.

The previous prime is 1363506413. The next prime is 1363506451. The reversal of 1363506421 is 1246053631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 967894321 + 395612100 = 31111^2 + 19890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1363506421 - 2³ = 1363506413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1363506451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 681753210 + 681753211.

It is an arithmetic number, because the mean of its divisors is an integer number (681753211).

Almost surely, 2^1363506421 is an apocalyptic number.

It is an amenable number.

1363506421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1363506421 is an equidigital number, since it uses as much as digits as its factorization.

1363506421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1363506421 is about 36925.6878202695. The cubic root of 1363506421 is about 1108.8830094038.

The spelling of 1363506421 in words is "one billion, three hundred sixty-three million, five hundred six thousand, four hundred twenty-one".