884237434921 has 9 divisors (see below), whose sum is σ = 890352822583. Its totient is φ = 878163785320.

The previous prime is 884237434919. The next prime is 884237434943. The reversal of 884237434921 is 129434732488.

The square root of 884237434921 is 940339.

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

It can be written as a sum of positive squares in only one way, i.e., 103594503321 + 780642931600 = 321861^2 + 883540^2 .

It is not a de Polignac number, because 884237434921 - 2¹ = 884237434919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (884237434981) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 140107356 + ... + 140113666.

Almost surely, 2^884237434921 is an apocalyptic number.

884237434921 is the 940339-th square number.

884237434921 is the 470170-th centered octagonal number.

It is an amenable number.

884237434921 is a deficient number, since it is larger than the sum of its proper divisors (6115387662).

884237434921 is an frugal number, since it uses more digits than its factorization.

884237434921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12920 (or 6460 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 55.

The spelling of 884237434921 in words is "eight hundred eighty-four billion, two hundred thirty-seven million, four hundred thirty-four thousand, nine hundred twenty-one".