69640553 has 2 divisors, whose sum is σ = 69640554. Its totient is φ = 69640552.

The previous prime is 69640531. The next prime is 69640579. The reversal of 69640553 is 35504696.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68095504 + 1545049 = 8252^2 + 1243^2 .

It is a cyclic number.

It is not a de Polignac number, because 69640553 - 2⁶ = 69640489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69640523) 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, 34820276 + 34820277.

It is an arithmetic number, because the mean of its divisors is an integer number (34820277).

Almost surely, 2^69640553 is an apocalyptic number.

It is an amenable number.

69640553 is a deficient number, since it is larger than the sum of its proper divisors (1).

69640553 is an equidigital number, since it uses as much as digits as its factorization.

69640553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 69640553 is about 8345.0915513252. The cubic root of 69640553 is about 411.4218983097.

The spelling of 69640553 in words is "sixty-nine million, six hundred forty thousand, five hundred fifty-three".