69001921 has 2 divisors, whose sum is σ = 69001922. Its totient is φ = 69001920.

The previous prime is 69001897. The next prime is 69001931. The reversal of 69001921 is 12910096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55577025 + 13424896 = 7455^2 + 3664^2 .

It is a cyclic number.

It is not a de Polignac number, because 69001921 - 2¹¹ = 68999873 is a prime.

It is a super-2 number, since 2×69001921² = 9522530203380482, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69001921.

It is not a weakly prime, because it can be changed into another prime (69001931) 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, 34500960 + 34500961.

It is an arithmetic number, because the mean of its divisors is an integer number (34500961).

Almost surely, 2^69001921 is an apocalyptic number.

It is an amenable number.

69001921 is a deficient number, since it is larger than the sum of its proper divisors (1).

69001921 is an equidigital number, since it uses as much as digits as its factorization.

69001921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 69001921 is about 8306.7394927252. The cubic root of 69001921 is about 410.1603992674.

The spelling of 69001921 in words is "sixty-nine million, one thousand, nine hundred twenty-one".