369963843863021 has 2 divisors, whose sum is σ = 369963843863022. Its totient is φ = 369963843863020.

The previous prime is 369963843863017. The next prime is 369963843863041. The reversal of 369963843863021 is 120368348369963.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199363386552100 + 170600457310921 = 14119610^2 + 13061411^2 .

It is a cyclic number.

It is not a de Polignac number, because 369963843863021 - 2² = 369963843863017 is a prime.

It is a super-2 number, since 2×369963843863021² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (369963843863041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184981921931510 + 184981921931511.

It is an arithmetic number, because the mean of its divisors is an integer number (184981921931511).

Almost surely, 2^{369963843863021} is an apocalyptic number.

It is an amenable number.

369963843863021 is a deficient number, since it is larger than the sum of its proper divisors (1).

369963843863021 is an equidigital number, since it uses as much as digits as its factorization.

369963843863021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725594112, while the sum is 71.

The spelling of 369963843863021 in words is "three hundred sixty-nine trillion, nine hundred sixty-three billion, eight hundred forty-three million, eight hundred sixty-three thousand, twenty-one".