80540969 has 2 divisors, whose sum is σ = 80540970. Its totient is φ = 80540968.

The previous prime is 80540899. The next prime is 80540989. The reversal of 80540969 is 96904508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80371225 + 169744 = 8965^2 + 412^2 .

It is a cyclic number.

It is not a de Polignac number, because 80540969 - 2¹² = 80536873 is a prime.

It is a super-2 number, since 2×80540969² = 12973695374917922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80540989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40270484 + 40270485.

It is an arithmetic number, because the mean of its divisors is an integer number (40270485).

Almost surely, 2^80540969 is an apocalyptic number.

It is an amenable number.

80540969 is a deficient number, since it is larger than the sum of its proper divisors (1).

80540969 is an equidigital number, since it uses as much as digits as its factorization.

80540969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 80540969 is about 8974.4620451590. The cubic root of 80540969 is about 431.8559923094.

The spelling of 80540969 in words is "eighty million, five hundred forty thousand, nine hundred sixty-nine".