730019999 has 4 divisors (see below), whose sum is σ = 730172400. Its totient is φ = 729867600.

The previous prime is 730019993. The next prime is 730020017. The reversal of 730019999 is 999910037.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 730019999 - 2⁸ = 730019743 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 (730019993) 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, 68774 + ... + 78675.

It is an arithmetic number, because the mean of its divisors is an integer number (182543100).

Almost surely, 2^730019999 is an apocalyptic number.

730019999 is a deficient number, since it is larger than the sum of its proper divisors (152401).

730019999 is a wasteful number, since it uses less digits than its factorization.

730019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152400.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 730019999 is about 27018.8822677771. The cubic root of 730019999 is about 900.4195570577.

The spelling of 730019999 in words is "seven hundred thirty million, nineteen thousand, nine hundred ninety-nine".