82154973 has 4 divisors (see below), whose sum is σ = 109539968. Its totient is φ = 54769980.

The previous prime is 82154971. The next prime is 82154981. The reversal of 82154973 is 37945128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 82154973 - 2¹ = 82154971 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 (82154971) 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, 13692493 + ... + 13692498.

It is an arithmetic number, because the mean of its divisors is an integer number (27384992).

Almost surely, 2^82154973 is an apocalyptic number.

It is an amenable number.

82154973 is a deficient number, since it is larger than the sum of its proper divisors (27384995).

82154973 is a wasteful number, since it uses less digits than its factorization.

82154973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27384994.

The product of its digits is 60480, while the sum is 39.

The square root of 82154973 is about 9063.9380514211. The cubic root of 82154973 is about 434.7216663120.

The spelling of 82154973 in words is "eighty-two million, one hundred fifty-four thousand, nine hundred seventy-three".