287923993421 has 8 divisors (see below), whose sum is σ = 288115350624. Its totient is φ = 287732699280.

The previous prime is 287923993417. The next prime is 287923993463. The reversal of 287923993421 is 124399329782.

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 287923993421 - 2² = 287923993417 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 (287923993481) 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, 11943446 + ... + 11967528.

It is an arithmetic number, because the mean of its divisors is an integer number (36014418828).

Almost surely, 2^287923993421 is an apocalyptic number.

It is an amenable number.

287923993421 is a deficient number, since it is larger than the sum of its proper divisors (191357203).

287923993421 is a wasteful number, since it uses less digits than its factorization.

287923993421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31531.

The product of its digits is 11757312, while the sum is 59.

The spelling of 287923993421 in words is "two hundred eighty-seven billion, nine hundred twenty-three million, nine hundred ninety-three thousand, four hundred twenty-one".