69245921 has 2 divisors, whose sum is σ = 69245922. Its totient is φ = 69245920.

The previous prime is 69245873. The next prime is 69245923. The reversal of 69245921 is 12954296.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46730896 + 22515025 = 6836^2 + 4745^2 .

It is a cyclic number.

It is not a de Polignac number, because 69245921 - 2⁶ = 69245857 is a prime.

Together with 69245923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69245923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34622960 + 34622961.

It is an arithmetic number, because the mean of its divisors is an integer number (34622961).

Almost surely, 2^69245921 is an apocalyptic number.

It is an amenable number.

69245921 is a deficient number, since it is larger than the sum of its proper divisors (1).

69245921 is an equidigital number, since it uses as much as digits as its factorization.

69245921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 69245921 is about 8321.4134015803. The cubic root of 69245921 is about 410.6432911578.

The spelling of 69245921 in words is "sixty-nine million, two hundred forty-five thousand, nine hundred twenty-one".