69947477 has 2 divisors, whose sum is σ = 69947478. Its totient is φ = 69947476.

The previous prime is 69947473. The next prime is 69947489. The reversal of 69947477 is 77474996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54257956 + 15689521 = 7366^2 + 3961^2 .

It is a cyclic number.

It is not a de Polignac number, because 69947477 - 2² = 69947473 is a 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 (69947473) 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, 34973738 + 34973739.

It is an arithmetic number, because the mean of its divisors is an integer number (34973739).

Almost surely, 2^69947477 is an apocalyptic number.

It is an amenable number.

69947477 is a deficient number, since it is larger than the sum of its proper divisors (1).

69947477 is an equidigital number, since it uses as much as digits as its factorization.

69947477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2667168, while the sum is 53.

The square root of 69947477 is about 8363.4608267152. The cubic root of 69947477 is about 412.0254269191.

The spelling of 69947477 in words is "sixty-nine million, nine hundred forty-seven thousand, four hundred seventy-seven".