69988081 has 2 divisors, whose sum is σ = 69988082. Its totient is φ = 69988080.

The previous prime is 69988033. The next prime is 69988091. The reversal of 69988081 is 18088996.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66977856 + 3010225 = 8184^2 + 1735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69988081 is a prime.

It is a super-3 number, since 3×69988081³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (69988091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34994040 + 34994041.

It is an arithmetic number, because the mean of its divisors is an integer number (34994041).

Almost surely, 2^69988081 is an apocalyptic number.

It is an amenable number.

69988081 is a deficient number, since it is larger than the sum of its proper divisors (1).

69988081 is an equidigital number, since it uses as much as digits as its factorization.

69988081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 69988081 is about 8365.8879385275. The cubic root of 69988081 is about 412.1051374153.

The spelling of 69988081 in words is "sixty-nine million, nine hundred eighty-eight thousand, eighty-one".