69800921 has 4 divisors (see below), whose sum is σ = 70757172. Its totient is φ = 68844672.

The previous prime is 69800917. The next prime is 69800957. The reversal of 69800921 is 12900896.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18835600 + 50965321 = 4340^2 + 7139^2 .

It is a cyclic number.

It is not a de Polignac number, because 69800921 - 2² = 69800917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69800021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478016 + ... + 478161.

It is an arithmetic number, because the mean of its divisors is an integer number (17689293).

Almost surely, 2^69800921 is an apocalyptic number.

It is an amenable number.

69800921 is a deficient number, since it is larger than the sum of its proper divisors (956251).

69800921 is an equidigital number, since it uses as much as digits as its factorization.

69800921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956250.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 69800921 is about 8354.6945485757. The cubic root of 69800921 is about 411.7374631328.

The spelling of 69800921 in words is "sixty-nine million, eight hundred thousand, nine hundred twenty-one".