943423690 has 36 divisors (see below), whose sum is σ = 1868691762. Its totient is φ = 342674640.

The previous prime is 943423643. The next prime is 943423693. The reversal of 943423690 is 96324349.

It can be written as a sum of positive squares in only one way, i.e., 849081321 + 94342369 = 29139^2 + 9713^2 .

It is a super-2 number, since 2×943423690² = 1780096517706432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (943423693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1067989 + ... + 1068871.

Almost surely, 2^943423690 is an apocalyptic number.

943423690 is a deficient number, since it is larger than the sum of its proper divisors (925268072).

943423690 is an equidigital number, since it uses as much as digits as its factorization.

943423690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 943423690 is about 30715.2029132155. The cubic root of 943423690 is about 980.7739582268.

Multiplying 943423690 by its sum of digits (40), we get a square (37736947600 = 194260²).

It can be divided in two parts, 9434 and 23690, that added together give a square (33124 = 182²).

The spelling of 943423690 in words is "nine hundred forty-three million, four hundred twenty-three thousand, six hundred ninety".