69939761 has 2 divisors, whose sum is σ = 69939762. Its totient is φ = 69939760.

The previous prime is 69939707. The next prime is 69939787. The reversal of 69939761 is 16793996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67749361 + 2190400 = 8231^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 69939761 - 2⁶ = 69939697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69939161) 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, 34969880 + 34969881.

It is an arithmetic number, because the mean of its divisors is an integer number (34969881).

Almost surely, 2^69939761 is an apocalyptic number.

It is an amenable number.

69939761 is a deficient number, since it is larger than the sum of its proper divisors (1).

69939761 is an equidigital number, since it uses as much as digits as its factorization.

69939761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 551124, while the sum is 50.

The square root of 69939761 is about 8362.9995217027. Note that the first 3 decimals coincide. The cubic root of 69939761 is about 412.0102760028.

The spelling of 69939761 in words is "sixty-nine million, nine hundred thirty-nine thousand, seven hundred sixty-one".