1623939353 has 2 divisors, whose sum is σ = 1623939354. Its totient is φ = 1623939352.

The previous prime is 1623939349. The next prime is 1623939397. The reversal of 1623939353 is 3539393261.

It is an a-pointer prime, because the next prime (1623939397) can be obtained adding 1623939353 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1116428569 + 507510784 = 33413^2 + 22528^2 .

It is a cyclic number.

It is not a de Polignac number, because 1623939353 - 2² = 1623939349 is a prime.

It is not a weakly prime, because it can be changed into another prime (1623939313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811969676 + 811969677.

It is an arithmetic number, because the mean of its divisors is an integer number (811969677).

Almost surely, 2^1623939353 is an apocalyptic number.

It is an amenable number.

1623939353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623939353 is an equidigital number, since it uses as much as digits as its factorization.

1623939353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393660, while the sum is 44.

The square root of 1623939353 is about 40298.1308871764. The cubic root of 1623939353 is about 1175.4114998725.

The spelling of 1623939353 in words is "one billion, six hundred twenty-three million, nine hundred thirty-nine thousand, three hundred fifty-three".