82154947 has 8 divisors (see below), whose sum is σ = 94609152. Its totient is φ = 69880200.

The previous prime is 82154887. The next prime is 82154951. The reversal of 82154947 is 74945128.

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

It is a cyclic number.

It is not a de Polignac number, because 82154947 - 2⁷ = 82154819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82154957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43879 + ... + 45712.

It is an arithmetic number, because the mean of its divisors is an integer number (11826144).

Almost surely, 2^82154947 is an apocalyptic number.

82154947 is a deficient number, since it is larger than the sum of its proper divisors (12454205).

82154947 is a wasteful number, since it uses less digits than its factorization.

82154947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89729.

The product of its digits is 80640, while the sum is 40.

The square root of 82154947 is about 9063.9366171659. The cubic root of 82154947 is about 434.7216204525.

The spelling of 82154947 in words is "eighty-two million, one hundred fifty-four thousand, nine hundred forty-seven".