193252981 has 2 divisors, whose sum is σ = 193252982. Its totient is φ = 193252980.

The previous prime is 193252921. The next prime is 193252993. The reversal of 193252981 is 189252391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180472356 + 12780625 = 13434^2 + 3575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-193252981 is a prime.

It is a super-2 number, since 2×193252981² = 74693429330772722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193252921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96626490 + 96626491.

It is an arithmetic number, because the mean of its divisors is an integer number (96626491).

Almost surely, 2^193252981 is an apocalyptic number.

It is an amenable number.

193252981 is a deficient number, since it is larger than the sum of its proper divisors (1).

193252981 is an equidigital number, since it uses as much as digits as its factorization.

193252981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The square root of 193252981 is about 13901.5459931621. The cubic root of 193252981 is about 578.1520465009.

The spelling of 193252981 in words is "one hundred ninety-three million, two hundred fifty-two thousand, nine hundred eighty-one".