729129461 has 2 divisors, whose sum is σ = 729129462. Its totient is φ = 729129460.

The previous prime is 729129451. The next prime is 729129487. The reversal of 729129461 is 164921927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 559322500 + 169806961 = 23650^2 + 13031^2 .

It is a cyclic number.

It is not a de Polignac number, because 729129461 - 2¹⁸ = 728867317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729129451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364564730 + 364564731.

It is an arithmetic number, because the mean of its divisors is an integer number (364564731).

Almost surely, 2^729129461 is an apocalyptic number.

It is an amenable number.

729129461 is a deficient number, since it is larger than the sum of its proper divisors (1).

729129461 is an equidigital number, since it uses as much as digits as its factorization.

729129461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 729129461 is about 27002.3973194974. The cubic root of 729129461 is about 900.0532729783.

The spelling of 729129461 in words is "seven hundred twenty-nine million, one hundred twenty-nine thousand, four hundred sixty-one".