863621427 has 4 divisors (see below), whose sum is σ = 1151495240. Its totient is φ = 575747616.

The previous prime is 863621419. The next prime is 863621441. The reversal of 863621427 is 724126368.

It is a happy number.

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

It is not a de Polignac number, because 863621427 - 2³ = 863621419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863621027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143936902 + ... + 143936907.

It is an arithmetic number, because the mean of its divisors is an integer number (287873810).

Almost surely, 2^863621427 is an apocalyptic number.

863621427 is a deficient number, since it is larger than the sum of its proper divisors (287873813).

863621427 is a wasteful number, since it uses less digits than its factorization.

863621427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287873812.

The product of its digits is 96768, while the sum is 39.

The square root of 863621427 is about 29387.4365503356. The cubic root of 863621427 is about 952.3015027155.

The spelling of 863621427 in words is "eight hundred sixty-three million, six hundred twenty-one thousand, four hundred twenty-seven".