434472721 has 2 divisors, whose sum is σ = 434472722. Its totient is φ = 434472720.

The previous prime is 434472707. The next prime is 434472761. The reversal of 434472721 is 127274434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382632721 + 51840000 = 19561^2 + 7200^2 .

It is a cyclic number.

It is not a de Polignac number, because 434472721 - 2¹⁵ = 434439953 is a prime.

It is not a weakly prime, because it can be changed into another prime (434472761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217236360 + 217236361.

It is an arithmetic number, because the mean of its divisors is an integer number (217236361).

Almost surely, 2^434472721 is an apocalyptic number.

It is an amenable number.

434472721 is a deficient number, since it is larger than the sum of its proper divisors (1).

434472721 is an equidigital number, since it uses as much as digits as its factorization.

434472721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 34.

The square root of 434472721 is about 20844.0092352695. The cubic root of 434472721 is about 757.3922169438.

The spelling of 434472721 in words is "four hundred thirty-four million, four hundred seventy-two thousand, seven hundred twenty-one".