83720629 has 2 divisors, whose sum is σ = 83720630. Its totient is φ = 83720628.

The previous prime is 83720599. The next prime is 83720633. The reversal of 83720629 is 92602738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82846404 + 874225 = 9102^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 83720629 - 2⁷ = 83720501 is a prime.

It is equal to p_4873645 and since 83720629 and 4873645 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83720639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41860314 + 41860315.

It is an arithmetic number, because the mean of its divisors is an integer number (41860315).

Almost surely, 2^83720629 is an apocalyptic number.

It is an amenable number.

83720629 is a deficient number, since it is larger than the sum of its proper divisors (1).

83720629 is an equidigital number, since it uses as much as digits as its factorization.

83720629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 83720629 is about 9149.8977589916. The cubic root of 83720629 is about 437.4658546413.

The spelling of 83720629 in words is "eighty-three million, seven hundred twenty thousand, six hundred twenty-nine".