1623609142 has 4 divisors (see below), whose sum is σ = 2435413716. Its totient is φ = 811804570.

The previous prime is 1623609121. The next prime is 1623609149. The reversal of 1623609142 is 2419063261.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1623609142² = 5272213291971952328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1623609098 and 1623609107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623609149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405902284 + ... + 405902287.

It is an arithmetic number, because the mean of its divisors is an integer number (608853429).

Almost surely, 2^1623609142 is an apocalyptic number.

1623609142 is a deficient number, since it is larger than the sum of its proper divisors (811804574).

1623609142 is an equidigital number, since it uses as much as digits as its factorization.

1623609142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811804573.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1623609142 is about 40294.0335781862. The cubic root of 1623609142 is about 1175.3318252803.

The spelling of 1623609142 in words is "one billion, six hundred twenty-three million, six hundred nine thousand, one hundred forty-two".