69488921 has 2 divisors, whose sum is σ = 69488922. Its totient is φ = 69488920.

The previous prime is 69488893. The next prime is 69488927. The reversal of 69488921 is 12988496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69488896 + 25 = 8336^2 + 5^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69488921 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (69488927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34744460 + 34744461.

It is an arithmetic number, because the mean of its divisors is an integer number (34744461).

Almost surely, 2^69488921 is an apocalyptic number.

It is an amenable number.

69488921 is a deficient number, since it is larger than the sum of its proper divisors (1).

69488921 is an equidigital number, since it uses as much as digits as its factorization.

69488921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 47.

The square root of 69488921 is about 8336.0014995200. The cubic root of 69488921 is about 411.1230778894.

The spelling of 69488921 in words is "sixty-nine million, four hundred eighty-eight thousand, nine hundred twenty-one".