69981071 has 2 divisors, whose sum is σ = 69981072. Its totient is φ = 69981070.

The previous prime is 69981053. The next prime is 69981077. The reversal of 69981071 is 17018996.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 69981071 - 2⁶ = 69981007 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69981077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34990535 + 34990536.

It is an arithmetic number, because the mean of its divisors is an integer number (34990536).

Almost surely, 2^69981071 is an apocalyptic number.

69981071 is a deficient number, since it is larger than the sum of its proper divisors (1).

69981071 is an equidigital number, since it uses as much as digits as its factorization.

69981071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 69981071 is about 8365.4689647383. The cubic root of 69981071 is about 412.0913781512.

The spelling of 69981071 in words is "sixty-nine million, nine hundred eighty-one thousand, seventy-one".