729129451 has 2 divisors, whose sum is σ = 729129452. Its totient is φ = 729129450.

The previous prime is 729129419. The next prime is 729129461. The reversal of 729129451 is 154921927.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 729129451 - 2⁵ = 729129419 is a prime.

It is a super-2 number, since 2×729129451² = 1063259512631122802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (729129461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364564725 + 364564726.

It is an arithmetic number, because the mean of its divisors is an integer number (364564726).

Almost surely, 2^729129451 is an apocalyptic number.

729129451 is a deficient number, since it is larger than the sum of its proper divisors (1).

729129451 is an equidigital number, since it uses as much as digits as its factorization.

729129451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 40.

The square root of 729129451 is about 27002.3971343286. The cubic root of 729129451 is about 900.0532688635.

The spelling of 729129451 in words is "seven hundred twenty-nine million, one hundred twenty-nine thousand, four hundred fifty-one".