69472309 has 2 divisors, whose sum is σ = 69472310. Its totient is φ = 69472308.

The previous prime is 69472301. The next prime is 69472373. The reversal of 69472309 is 90327496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68310225 + 1162084 = 8265^2 + 1078^2 .

It is a cyclic number.

It is not a de Polignac number, because 69472309 - 2³ = 69472301 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69472301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34736154 + 34736155.

It is an arithmetic number, because the mean of its divisors is an integer number (34736155).

Almost surely, 2^69472309 is an apocalyptic number.

It is an amenable number.

69472309 is a deficient number, since it is larger than the sum of its proper divisors (1).

69472309 is an equidigital number, since it uses as much as digits as its factorization.

69472309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 69472309 is about 8335.0050389907. The cubic root of 69472309 is about 411.0903142930.

The spelling of 69472309 in words is "sixty-nine million, four hundred seventy-two thousand, three hundred nine".