1953321499 has 2 divisors, whose sum is σ = 1953321500. Its totient is φ = 1953321498.

The previous prime is 1953321493. The next prime is 1953321511. The reversal of 1953321499 is 9941233591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1953321499 - 2¹¹ = 1953319451 is a prime.

It is not a weakly prime, because it can be changed into another prime (1953321493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976660749 + 976660750.

It is an arithmetic number, because the mean of its divisors is an integer number (976660750).

Almost surely, 2^1953321499 is an apocalyptic number.

1953321499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953321499 is an equidigital number, since it uses as much as digits as its factorization.

1953321499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 46.

The square root of 1953321499 is about 44196.3969006524. The cubic root of 1953321499 is about 1250.0419183809.

The spelling of 1953321499 in words is "one billion, nine hundred fifty-three million, three hundred twenty-one thousand, four hundred ninety-nine".