82721954 has 8 divisors (see below), whose sum is σ = 141809088. Its totient is φ = 35452260.

The previous prime is 82721941. The next prime is 82721959. The reversal of 82721954 is 45912728.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a pancake number, because a pancake can be divided into 82721954 parts by 12862 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (82721959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2954342 + ... + 2954369.

It is an arithmetic number, because the mean of its divisors is an integer number (17726136).

Almost surely, 2^82721954 is an apocalyptic number.

82721954 is a deficient number, since it is larger than the sum of its proper divisors (59087134).

82721954 is a wasteful number, since it uses less digits than its factorization.

82721954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5908720.

The product of its digits is 40320, while the sum is 38.

The square root of 82721954 is about 9095.1610211145. The cubic root of 82721954 is about 435.7194313363.

The spelling of 82721954 in words is "eighty-two million, seven hundred twenty-one thousand, nine hundred fifty-four".