287625397 has 4 divisors (see below), whose sum is σ = 304544556. Its totient is φ = 270706240.

The previous prime is 287625379. The next prime is 287625407. The reversal of 287625397 is 793526782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 249197796 + 38427601 = 15786^2 + 6199^2 .

It is a cyclic number.

It is not a de Polignac number, because 287625397 - 2¹⁵ = 287592629 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 287625397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287625307) 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, 8459554 + ... + 8459587.

It is an arithmetic number, because the mean of its divisors is an integer number (76136139).

Almost surely, 2^287625397 is an apocalyptic number.

It is an amenable number.

287625397 is a deficient number, since it is larger than the sum of its proper divisors (16919159).

287625397 is a wasteful number, since it uses less digits than its factorization.

287625397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16919158.

The product of its digits is 1270080, while the sum is 49.

The square root of 287625397 is about 16959.5223104898. The cubic root of 287625397 is about 660.0990033607.

The spelling of 287625397 in words is "two hundred eighty-seven million, six hundred twenty-five thousand, three hundred ninety-seven".