1623719253 has 8 divisors (see below), whose sum is σ = 2331494368. Its totient is φ = 999211824.

The previous prime is 1623719243. The next prime is 1623719287. The reversal of 1623719253 is 3529173261.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1623719253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 41633827 = 1623719253 / (1 + 6 + 2 + 3 + 7 + 1 + 9 + 2 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623719213) 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, 20816875 + ... + 20816952.

It is an arithmetic number, because the mean of its divisors is an integer number (291436796).

Almost surely, 2^1623719253 is an apocalyptic number.

1623719253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1623719253 is a deficient number, since it is larger than the sum of its proper divisors (707775115).

1623719253 is a wasteful number, since it uses less digits than its factorization.

1623719253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41633843.

The product of its digits is 68040, while the sum is 39.

The square root of 1623719253 is about 40295.3998987477. The cubic root of 1623719253 is about 1175.3583944903.

The spelling of 1623719253 in words is "one billion, six hundred twenty-three million, seven hundred nineteen thousand, two hundred fifty-three".