84629729 has 2 divisors, whose sum is σ = 84629730. Its totient is φ = 84629728.

The previous prime is 84629717. The next prime is 84629737. The reversal of 84629729 is 92792648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82319329 + 2310400 = 9073^2 + 1520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84629729 is a prime.

It is a super-2 number, since 2×84629729² = 14324382061226882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84629759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42314864 + 42314865.

It is an arithmetic number, because the mean of its divisors is an integer number (42314865).

Almost surely, 2^84629729 is an apocalyptic number.

It is an amenable number.

84629729 is a deficient number, since it is larger than the sum of its proper divisors (1).

84629729 is an equidigital number, since it uses as much as digits as its factorization.

84629729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 84629729 is about 9199.4417765427. The cubic root of 84629729 is about 439.0435992902.

It can be divided in two parts, 84629 and 729, that added together give a palindrome (85358).

The spelling of 84629729 in words is "eighty-four million, six hundred twenty-nine thousand, seven hundred twenty-nine".