82147901 has 4 divisors (see below), whose sum is σ = 89615904. Its totient is φ = 74679900.

The previous prime is 82147889. The next prime is 82147903. The reversal of 82147901 is 10974128.

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 a cyclic number.

It is not a de Polignac number, because 82147901 - 2⁶ = 82147837 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 (82147903) 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, 3733985 + ... + 3734006.

It is an arithmetic number, because the mean of its divisors is an integer number (22403976).

Almost surely, 2^82147901 is an apocalyptic number.

It is an amenable number.

82147901 is a deficient number, since it is larger than the sum of its proper divisors (7468003).

82147901 is a wasteful number, since it uses less digits than its factorization.

82147901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7468002.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 82147901 is about 9063.5479256194. The cubic root of 82147901 is about 434.7091921642.

The spelling of 82147901 in words is "eighty-two million, one hundred forty-seven thousand, nine hundred one".