429209638721 has 2 divisors, whose sum is σ = 429209638722. Its totient is φ = 429209638720.

The previous prime is 429209638687. The next prime is 429209638777. The reversal of 429209638721 is 127836902924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372832360000 + 56377278721 = 610600^2 + 237439^2 .

It is a cyclic number.

It is not a de Polignac number, because 429209638721 - 2³⁰ = 428135896897 is a prime.

It is a super-2 number, since 2×429209638721² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (429209838721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214604819360 + 214604819361.

It is an arithmetic number, because the mean of its divisors is an integer number (214604819361).

Almost surely, 2^429209638721 is an apocalyptic number.

It is an amenable number.

429209638721 is a deficient number, since it is larger than the sum of its proper divisors (1).

429209638721 is an equidigital number, since it uses as much as digits as its factorization.

429209638721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 429209638721 in words is "four hundred twenty-nine billion, two hundred nine million, six hundred thirty-eight thousand, seven hundred twenty-one".