723040534 has 4 divisors (see below), whose sum is σ = 1084560804. Its totient is φ = 361520266.

The previous prime is 723040531. The next prime is 723040541. The reversal of 723040534 is 435040327.

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

It is a super-2 number, since 2×723040534² = 1045575227614010312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723040531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180760132 + ... + 180760135.

It is an arithmetic number, because the mean of its divisors is an integer number (271140201).

Almost surely, 2^723040534 is an apocalyptic number.

723040534 is a deficient number, since it is larger than the sum of its proper divisors (361520270).

723040534 is a wasteful number, since it uses less digits than its factorization.

723040534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361520269.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 723040534 is about 26889.4130467736. The cubic root of 723040534 is about 897.5408315209.

The spelling of 723040534 in words is "seven hundred twenty-three million, forty thousand, five hundred thirty-four".