81469433 has 2 divisors, whose sum is σ = 81469434. Its totient is φ = 81469432.

The previous prime is 81469411. The next prime is 81469441. The reversal of 81469433 is 33496418.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46280809 + 35188624 = 6803^2 + 5932^2 .

It is a cyclic number.

It is not a de Polignac number, because 81469433 - 2⁶ = 81469369 is a prime.

It is not a weakly prime, because it can be changed into another prime (81469733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40734716 + 40734717.

It is an arithmetic number, because the mean of its divisors is an integer number (40734717).

Almost surely, 2^81469433 is an apocalyptic number.

It is an amenable number.

81469433 is a deficient number, since it is larger than the sum of its proper divisors (1).

81469433 is an equidigital number, since it uses as much as digits as its factorization.

81469433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 81469433 is about 9026.0419343143. The cubic root of 81469433 is about 433.5091128414.

The spelling of 81469433 in words is "eighty-one million, four hundred sixty-nine thousand, four hundred thirty-three".