69019421 has 2 divisors, whose sum is σ = 69019422. Its totient is φ = 69019420.

The previous prime is 69019399. The next prime is 69019427. The reversal of 69019421 is 12491096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66504025 + 2515396 = 8155^2 + 1586^2 .

It is a cyclic number.

It is not a de Polignac number, because 69019421 - 2¹⁸ = 68757277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69019427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34509710 + 34509711.

It is an arithmetic number, because the mean of its divisors is an integer number (34509711).

Almost surely, 2^69019421 is an apocalyptic number.

It is an amenable number.

69019421 is a deficient number, since it is larger than the sum of its proper divisors (1).

69019421 is an equidigital number, since it uses as much as digits as its factorization.

69019421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 69019421 is about 8307.7927874978. The cubic root of 69019421 is about 410.1950707672.

The spelling of 69019421 in words is "sixty-nine million, nineteen thousand, four hundred twenty-one".