69628789 has 2 divisors, whose sum is σ = 69628790. Its totient is φ = 69628788.

The previous prime is 69628771. The next prime is 69628799. The reversal of 69628789 is 98782696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60326289 + 9302500 = 7767^2 + 3050^2 .

It is a cyclic number.

It is not a de Polignac number, because 69628789 - 2⁷ = 69628661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69628729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34814394 + 34814395.

It is an arithmetic number, because the mean of its divisors is an integer number (34814395).

Almost surely, 2^69628789 is an apocalyptic number.

It is an amenable number.

69628789 is a deficient number, since it is larger than the sum of its proper divisors (1).

69628789 is an equidigital number, since it uses as much as digits as its factorization.

69628789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 55.

The square root of 69628789 is about 8344.3866760835. The cubic root of 69628789 is about 411.3987305837.

It can be divided in two parts, 6962 and 8789, that added together give a palindrome (15751).

The spelling of 69628789 in words is "sixty-nine million, six hundred twenty-eight thousand, seven hundred eighty-nine".