69009961 has 2 divisors, whose sum is σ = 69009962. Its totient is φ = 69009960.

The previous prime is 69009943. The next prime is 69009973. The reversal of 69009961 is 16990096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59768361 + 9241600 = 7731^2 + 3040^2 .

It is a cyclic number.

It is not a de Polignac number, because 69009961 - 2¹³ = 69001769 is a prime.

It is not a weakly prime, because it can be changed into another prime (69009901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34504980 + 34504981.

It is an arithmetic number, because the mean of its divisors is an integer number (34504981).

Almost surely, 2^69009961 is an apocalyptic number.

It is an amenable number.

69009961 is a deficient number, since it is larger than the sum of its proper divisors (1).

69009961 is an equidigital number, since it uses as much as digits as its factorization.

69009961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 69009961 is about 8307.2234230217. The cubic root of 69009961 is about 410.1763290728.

It can be divided in two parts, 6900 and 9961, that added together give a palindrome (16861).

The spelling of 69009961 in words is "sixty-nine million, nine thousand, nine hundred sixty-one".