78730129 has 9 divisors (see below), whose sum is σ = 83270217. Its totient is φ = 74426724.

The previous prime is 78730109. The next prime is 78730133. The reversal of 78730129 is 92103787.

The square root of 78730129 is 8873.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 78730129 - 2⁹ = 78729617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78730109) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 168354 + ... + 168820.

Almost surely, 2^78730129 is an apocalyptic number.

78730129 is the 8873-rd square number.

78730129 is the 4437-th centered octagonal number.

It is an amenable number.

78730129 is a deficient number, since it is larger than the sum of its proper divisors (4540088).

78730129 is an frugal number, since it uses more digits than its factorization.

78730129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The cubic root of 78730129 is about 428.5948889115.

The spelling of 78730129 in words is "seventy-eight million, seven hundred thirty thousand, one hundred twenty-nine".