723398066 has 4 divisors (see below), whose sum is σ = 1085097102. Its totient is φ = 361699032.

The previous prime is 723398033. The next prime is 723398087. The reversal of 723398066 is 660893327.

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

It can be written as a sum of positive squares in only one way, i.e., 618765625 + 104632441 = 24875^2 + 10229^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180849515 + ... + 180849518.

Almost surely, 2^723398066 is an apocalyptic number.

723398066 is a deficient number, since it is larger than the sum of its proper divisors (361699036).

723398066 is a wasteful number, since it uses less digits than its factorization.

723398066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361699035.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 723398066 is about 26896.0604178381. The cubic root of 723398066 is about 897.6887470134.

The spelling of 723398066 in words is "seven hundred twenty-three million, three hundred ninety-eight thousand, sixty-six".