8376400621 has 2 divisors, whose sum is σ = 8376400622. Its totient is φ = 8376400620.

The previous prime is 8376400619. The next prime is 8376400631. The reversal of 8376400621 is 1260046738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6953224996 + 1423175625 = 83386^2 + 37725^2 .

It is a cyclic number.

It is not a de Polignac number, because 8376400621 - 2¹ = 8376400619 is a prime.

Together with 8376400619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8376400631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4188200310 + 4188200311.

It is an arithmetic number, because the mean of its divisors is an integer number (4188200311).

Almost surely, 2^8376400621 is an apocalyptic number.

It is an amenable number.

8376400621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8376400621 is an equidigital number, since it uses as much as digits as its factorization.

8376400621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 8376400621 is about 91522.6781786897. The cubic root of 8376400621 is about 2030.8872516650.

The spelling of 8376400621 in words is "eight billion, three hundred seventy-six million, four hundred thousand, six hundred twenty-one".