1623400043 has 8 divisors (see below), whose sum is σ = 1674965040. Its totient is φ = 1572405120.

The previous prime is 1623400021. The next prime is 1623400073. The reversal of 1623400043 is 3400043261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1623400043 - 2¹⁴ = 1623383659 is a prime.

It is a super-2 number, since 2×1623400043² = 5270855399224803698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1623399991 and 1623400018.

It is not an unprimeable number, because it can be changed into a prime (1623400073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136730 + ... + 148127.

It is an arithmetic number, because the mean of its divisors is an integer number (209370630).

Almost surely, 2^1623400043 is an apocalyptic number.

1623400043 is a deficient number, since it is larger than the sum of its proper divisors (51564997).

1623400043 is a wasteful number, since it uses less digits than its factorization.

1623400043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285037.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1623400043 is about 40291.4388301038. The cubic root of 1623400043 is about 1175.2813674753.

The spelling of 1623400043 in words is "one billion, six hundred twenty-three million, four hundred thousand, forty-three".