723660145 has 32 divisors (see below), whose sum is σ = 965260800. Its totient is φ = 517480704.

The previous prime is 723660139. The next prime is 723660191. The reversal of 723660145 is 541066327.

It is a happy number.

It is not a de Polignac number, because 723660145 - 2¹¹ = 723658097 is a prime.

It is a super-2 number, since 2×723660145² = 1047368010922842050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 723660145.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270826 + ... + 273484.

It is an arithmetic number, because the mean of its divisors is an integer number (30164400).

Almost surely, 2^723660145 is an apocalyptic number.

It is an amenable number.

723660145 is a deficient number, since it is larger than the sum of its proper divisors (241600655).

723660145 is a wasteful number, since it uses less digits than its factorization.

723660145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 723660145 is about 26900.9320470500. The cubic root of 723660145 is about 897.7971414436.

The spelling of 723660145 in words is "seven hundred twenty-three million, six hundred sixty thousand, one hundred forty-five".