999614021 has 8 divisors (see below), whose sum is σ = 1181809920. Its totient is φ = 827266608.

The previous prime is 999613987. The next prime is 999614047. The reversal of 999614021 is 120416999.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-999614021 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 999614021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999614081) 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, 2461901 + ... + 2462306.

It is an arithmetic number, because the mean of its divisors is an integer number (147726240).

Almost surely, 2^999614021 is an apocalyptic number.

It is an amenable number.

999614021 is a deficient number, since it is larger than the sum of its proper divisors (182195899).

999614021 is a wasteful number, since it uses less digits than its factorization.

999614021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924243.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 999614021 is about 31616.6731488308. The cubic root of 999614021 is about 999.8713237765.

The spelling of 999614021 in words is "nine hundred ninety-nine million, six hundred fourteen thousand, twenty-one".