1953923357 has 2 divisors, whose sum is σ = 1953923358. Its totient is φ = 1953923356.

The previous prime is 1953923317. The next prime is 1953923359. The reversal of 1953923357 is 7533293591.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1881911161 + 72012196 = 43381^2 + 8486^2 .

It is a cyclic number.

It is not a de Polignac number, because 1953923357 - 2¹⁴ = 1953906973 is a prime.

Together with 1953923359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1953923359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976961678 + 976961679.

It is an arithmetic number, because the mean of its divisors is an integer number (976961679).

Almost surely, 2^1953923357 is an apocalyptic number.

It is an amenable number.

1953923357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953923357 is an equidigital number, since it uses as much as digits as its factorization.

1953923357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 765450, while the sum is 47.

The square root of 1953923357 is about 44203.2052797079. The cubic root of 1953923357 is about 1250.1702929592.

The spelling of 1953923357 in words is "one billion, nine hundred fifty-three million, nine hundred twenty-three thousand, three hundred fifty-seven".