193031149 has 2 divisors, whose sum is σ = 193031150. Its totient is φ = 193031148.

The previous prime is 193031147. The next prime is 193031177. The reversal of 193031149 is 941130391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192515625 + 515524 = 13875^2 + 718^2 .

It is an emirp because it is prime and its reverse (941130391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 193031149 - 2¹ = 193031147 is a prime.

It is a super-2 number, since 2×193031149² = 74522048968520402, which contains 22 as substring.

Together with 193031147, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 193031149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193031147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96515574 + 96515575.

It is an arithmetic number, because the mean of its divisors is an integer number (96515575).

Almost surely, 2^193031149 is an apocalyptic number.

It is an amenable number.

193031149 is a deficient number, since it is larger than the sum of its proper divisors (1).

193031149 is an equidigital number, since it uses as much as digits as its factorization.

193031149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 193031149 is about 13893.5650212607. The cubic root of 193031149 is about 577.9307446466.

The spelling of 193031149 in words is "one hundred ninety-three million, thirty-one thousand, one hundred forty-nine".