83981000377 has 2 divisors, whose sum is σ = 83981000378. Its totient is φ = 83981000376.

The previous prime is 83981000351. The next prime is 83981000393. The reversal of 83981000377 is 77300018938.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76292516521 + 7688483856 = 276211^2 + 87684^2 .

It is a cyclic number.

It is not a de Polignac number, because 83981000377 - 2¹¹ = 83980998329 is a prime.

It is not a weakly prime, because it can be changed into another prime (83981003377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41990500188 + 41990500189.

It is an arithmetic number, because the mean of its divisors is an integer number (41990500189).

Almost surely, 2^83981000377 is an apocalyptic number.

It is an amenable number.

83981000377 is a deficient number, since it is larger than the sum of its proper divisors (1).

83981000377 is an equidigital number, since it uses as much as digits as its factorization.

83981000377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 83981000377 in words is "eighty-three billion, nine hundred eighty-one million, three hundred seventy-seven", and thus it is an aban number.