191369953 has 2 divisors, whose sum is σ = 191369954. Its totient is φ = 191369952.

The previous prime is 191369917. The next prime is 191369989. The reversal of 191369953 is 359963191.

It is a balanced prime because it is at equal distance from previous prime (191369917) and next prime (191369989).

It can be written as a sum of positive squares in only one way, i.e., 134397649 + 56972304 = 11593^2 + 7548^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191369953 is a prime.

It is a super-2 number, since 2×191369953² = 73244917822444418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (191369053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95684976 + 95684977.

It is an arithmetic number, because the mean of its divisors is an integer number (95684977).

Almost surely, 2^191369953 is an apocalyptic number.

It is an amenable number.

191369953 is a deficient number, since it is larger than the sum of its proper divisors (1).

191369953 is an equidigital number, since it uses as much as digits as its factorization.

191369953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 196830, while the sum is 46.

The square root of 191369953 is about 13833.6529159872. The cubic root of 191369953 is about 576.2681053595.

The spelling of 191369953 in words is "one hundred ninety-one million, three hundred sixty-nine thousand, nine hundred fifty-three".