75289729 has 2 divisors, whose sum is σ = 75289730. Its totient is φ = 75289728.

The previous prime is 75289703. The next prime is 75289763. The reversal of 75289729 is 92798257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66048129 + 9241600 = 8127^2 + 3040^2 .

It is a cyclic number.

It is not a de Polignac number, because 75289729 - 2¹³ = 75281537 is a prime.

It is not a weakly prime, because it can be changed into another prime (75283729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37644864 + 37644865.

It is an arithmetic number, because the mean of its divisors is an integer number (37644865).

Almost surely, 2^75289729 is an apocalyptic number.

It is an amenable number.

75289729 is a deficient number, since it is larger than the sum of its proper divisors (1).

75289729 is an equidigital number, since it uses as much as digits as its factorization.

75289729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 49.

The square root of 75289729 is about 8676.9654257695. The cubic root of 75289729 is about 422.2586724482.

The spelling of 75289729 in words is "seventy-five million, two hundred eighty-nine thousand, seven hundred twenty-nine".