421950278929 has 3 divisors (see below), whose sum is σ = 421950928507. Its totient is φ = 421949629352.

The previous prime is 421950278921. The next prime is 421950278963. The reversal of 421950278929 is 929872059124.

The square root of 421950278929 is 649577.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 47954430225 + 373995848704 = 218985^2 + 611552^2 .

It is not a de Polignac number, because 421950278929 - 2³ = 421950278921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421950278921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 324789 + ... + 974365.

Almost surely, 2^421950278929 is an apocalyptic number.

421950278929 is the 649577-th square number.

421950278929 is the 324789-th centered octagonal number.

It is an amenable number.

421950278929 is a deficient number, since it is larger than the sum of its proper divisors (649578).

421950278929 is an frugal number, since it uses more digits than its factorization.

421950278929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299154 (or 649577 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 421950278929 in words is "four hundred twenty-one billion, nine hundred fifty million, two hundred seventy-eight thousand, nine hundred twenty-nine".