1043400623 has 4 divisors (see below), whose sum is σ = 1043532840. Its totient is φ = 1043268408.

The previous prime is 1043400587. The next prime is 1043400641. The reversal of 1043400623 is 3260043401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3260043401 = 521 ⋅6257281.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1043400623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043400643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53465 + ... + 70322.

It is an arithmetic number, because the mean of its divisors is an integer number (260883210).

Almost surely, 2^1043400623 is an apocalyptic number.

1043400623 is a deficient number, since it is larger than the sum of its proper divisors (132217).

1043400623 is an equidigital number, since it uses as much as digits as its factorization.

1043400623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132216.

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

The square root of 1043400623 is about 32301.7123849495. The cubic root of 1043400623 is about 1014.2624886653.

The spelling of 1043400623 in words is "one billion, forty-three million, four hundred thousand, six hundred twenty-three".