69478081 has 2 divisors, whose sum is σ = 69478082. Its totient is φ = 69478080.

The previous prime is 69478069. The next prime is 69478109. The reversal of 69478081 is 18087496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68558400 + 919681 = 8280^2 + 959^2 .

It is a cyclic number.

It is not a de Polignac number, because 69478081 - 2⁵ = 69478049 is a prime.

It is a super-2 number, since 2×69478081² = 9654407478885122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (69478021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34739040 + 34739041.

It is an arithmetic number, because the mean of its divisors is an integer number (34739041).

Almost surely, 2^69478081 is an apocalyptic number.

It is an amenable number.

69478081 is a deficient number, since it is larger than the sum of its proper divisors (1).

69478081 is an equidigital number, since it uses as much as digits as its factorization.

69478081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 69478081 is about 8335.3512823396. The cubic root of 69478081 is about 411.1016989134.

The spelling of 69478081 in words is "sixty-nine million, four hundred seventy-eight thousand, eighty-one".