1953565139 has 2 divisors, whose sum is σ = 1953565140. Its totient is φ = 1953565138.

The previous prime is 1953565127. The next prime is 1953565147. The reversal of 1953565139 is 9315653591.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1953565139 - 2²⁸ = 1685129683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1953565093 and 1953565102.

It is not a weakly prime, because it can be changed into another prime (1953565739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976782569 + 976782570.

It is an arithmetic number, because the mean of its divisors is an integer number (976782570).

Almost surely, 2^1953565139 is an apocalyptic number.

1953565139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953565139 is an equidigital number, since it uses as much as digits as its factorization.

1953565139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 546750, while the sum is 47.

The square root of 1953565139 is about 44199.1531479959. The cubic root of 1953565139 is about 1250.0938892677.

The spelling of 1953565139 in words is "one billion, nine hundred fifty-three million, five hundred sixty-five thousand, one hundred thirty-nine".