69438643 has 2 divisors, whose sum is σ = 69438644. Its totient is φ = 69438642.

The previous prime is 69438581. The next prime is 69438653. The reversal of 69438643 is 34683496.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 69438643 - 2¹⁷ = 69307571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69438643.

It is not a weakly prime, because it can be changed into another prime (69438653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34719321 + 34719322.

It is an arithmetic number, because the mean of its divisors is an integer number (34719322).

Almost surely, 2^69438643 is an apocalyptic number.

69438643 is a deficient number, since it is larger than the sum of its proper divisors (1).

69438643 is an equidigital number, since it uses as much as digits as its factorization.

69438643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 43.

The square root of 69438643 is about 8332.9852393965. The cubic root of 69438643 is about 411.0238993291.

The spelling of 69438643 in words is "sixty-nine million, four hundred thirty-eight thousand, six hundred forty-three".