88129729 has 2 divisors, whose sum is σ = 88129730. Its totient is φ = 88129728.

The previous prime is 88129693. The next prime is 88129739. The reversal of 88129729 is 92792188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75690000 + 12439729 = 8700^2 + 3527^2 .

It is a cyclic number.

It is not a de Polignac number, because 88129729 - 2²¹ = 86032577 is a prime.

It is a super-2 number, since 2×88129729² = 15533698267226882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (88129739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44064864 + 44064865.

It is an arithmetic number, because the mean of its divisors is an integer number (44064865).

Almost surely, 2^88129729 is an apocalyptic number.

It is an amenable number.

88129729 is a deficient number, since it is larger than the sum of its proper divisors (1).

88129729 is an equidigital number, since it uses as much as digits as its factorization.

88129729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 46.

The square root of 88129729 is about 9387.7435521003. The cubic root of 88129729 is about 445.0144825485.

The spelling of 88129729 in words is "eighty-eight million, one hundred twenty-nine thousand, seven hundred twenty-nine".