621161383 has 2 divisors, whose sum is σ = 621161384. Its totient is φ = 621161382.

The previous prime is 621161311. The next prime is 621161399. The reversal of 621161383 is 383161126.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621161383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621161083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310580691 + 310580692.

It is an arithmetic number, because the mean of its divisors is an integer number (310580692).

Almost surely, 2^621161383 is an apocalyptic number.

621161383 is a deficient number, since it is larger than the sum of its proper divisors (1).

621161383 is an equidigital number, since it uses as much as digits as its factorization.

621161383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 621161383 is about 24923.1094167642. The cubic root of 621161383 is about 853.2339928337.

The spelling of 621161383 in words is "six hundred twenty-one million, one hundred sixty-one thousand, three hundred eighty-three".