721612814 has 8 divisors (see below), whose sum is σ = 1165682280. Its totient is φ = 333052056.

The previous prime is 721612789. The next prime is 721612819. The reversal of 721612814 is 418216127.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721612819) 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, 13877144 + ... + 13877195.

It is an arithmetic number, because the mean of its divisors is an integer number (145710285).

Almost surely, 2^721612814 is an apocalyptic number.

721612814 is a deficient number, since it is larger than the sum of its proper divisors (444069466).

721612814 is a wasteful number, since it uses less digits than its factorization.

721612814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27754354.

The product of its digits is 5376, while the sum is 32.

The square root of 721612814 is about 26862.8519334787. The cubic root of 721612814 is about 896.9496791551.

The spelling of 721612814 in words is "seven hundred twenty-one million, six hundred twelve thousand, eight hundred fourteen".