623099042 has 4 divisors (see below), whose sum is σ = 934648566. Its totient is φ = 311549520.

The previous prime is 623099027. The next prime is 623099047. The reversal of 623099042 is 240990326.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240990326 = 2 ⋅120495163.

It can be written as a sum of positive squares in only one way, i.e., 613107121 + 9991921 = 24761^2 + 3161^2 .

It is a super-2 number, since 2×623099042² = 776504832282635528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 623098993 and 623099011.

It is not an unprimeable number, because it can be changed into a prime (623099047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155774759 + ... + 155774762.

Almost surely, 2^623099042 is an apocalyptic number.

623099042 is a deficient number, since it is larger than the sum of its proper divisors (311549524).

623099042 is a wasteful number, since it uses less digits than its factorization.

623099042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311549523.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 623099042 is about 24961.9518868217. The cubic root of 623099042 is about 854.1202683703.

The spelling of 623099042 in words is "six hundred twenty-three million, ninety-nine thousand, forty-two".