387641273 has 4 divisors (see below), whose sum is σ = 389882148. Its totient is φ = 385400400.

The previous prime is 387641263. The next prime is 387641339. The reversal of 387641273 is 372146783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 372146783 = 613 ⋅607091.

It can be written as a sum of positive squares in 2 ways, for example, as 316946809 + 70694464 = 17803^2 + 8408^2 .

It is a cyclic number.

It is not a de Polignac number, because 387641273 - 2⁴ = 387641257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 387641273.

It is not an unprimeable number, because it can be changed into a prime (387641203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120178 + ... + 1120523.

It is an arithmetic number, because the mean of its divisors is an integer number (97470537).

Almost surely, 2^387641273 is an apocalyptic number.

It is an amenable number.

387641273 is a deficient number, since it is larger than the sum of its proper divisors (2240875).

387641273 is a wasteful number, since it uses less digits than its factorization.

387641273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240874.

The product of its digits is 169344, while the sum is 41.

The square root of 387641273 is about 19688.6076958225. The cubic root of 387641273 is about 729.1384550514.

The spelling of 387641273 in words is "three hundred eighty-seven million, six hundred forty-one thousand, two hundred seventy-three".