29323188877921 has 9 divisors (see below), whose sum is σ = 29352942447033. Its totient is φ = 29293465454400.

The previous prime is 29323188877861. The next prime is 29323188877981. The reversal of 29323188877921 is 12977888132392.

The square root of 29323188877921 is 5415089.

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

It is an interprime number because it is at equal distance from previous prime (29323188877861) and next prime (29323188877981).

It can be written as a sum of positive squares in 4 ways, for example, as 1260318324321 + 28062870553600 = 1122639^2 + 5297440^2 .

It is not a de Polignac number, because 29323188877921 - 2¹³ = 29323188869729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29323188877981) 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, 6980047621 + ... + 6980051821.

Almost surely, 2^{29323188877921} is an apocalyptic number.

29323188877921 is the 5415089-th square number.

29323188877921 is the 2707545-th centered octagonal number.

It is an amenable number.

29323188877921 is a deficient number, since it is larger than the sum of its proper divisors (29753569112).

29323188877921 is an frugal number, since it uses more digits than its factorization.

29323188877921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10980 (or 5490 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 70.

The spelling of 29323188877921 in words is "twenty-nine trillion, three hundred twenty-three billion, one hundred eighty-eight million, eight hundred seventy-seven thousand, nine hundred twenty-one".