81469983 has 16 divisors (see below), whose sum is σ = 124288256. Its totient is φ = 46500480.

The previous prime is 81469981. The next prime is 81470017. The reversal of 81469983 is 38996418.

It is not a de Polignac number, because 81469983 - 2¹ = 81469981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81469981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22935 + ... + 26247.

It is an arithmetic number, because the mean of its divisors is an integer number (7768016).

Almost surely, 2^81469983 is an apocalyptic number.

81469983 is a deficient number, since it is larger than the sum of its proper divisors (42818273).

81469983 is a wasteful number, since it uses less digits than its factorization.

81469983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4494.

The product of its digits is 373248, while the sum is 48.

The square root of 81469983 is about 9026.0724016595. The cubic root of 81469983 is about 433.5100883790.

The spelling of 81469983 in words is "eighty-one million, four hundred sixty-nine thousand, nine hundred eighty-three".