1993151 has 2 divisors, whose sum is σ = 1993152. Its totient is φ = 1993150.

The previous prime is 1993127. The next prime is 1993163. The reversal of 1993151 is 1513991.

It is a strong prime.

It is an emirp because it is prime and its reverse (1513991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1993151 - 2⁶ = 1993087 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996575 + 996576.

It is an arithmetic number, because the mean of its divisors is an integer number (996576).

2^1993151 is an apocalyptic number.

1993151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993151 is an equidigital number, since it uses as much as digits as its factorization.

1993151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1215, while the sum is 29.

The square root of 1993151 is about 1411.7899985479. The cubic root of 1993151 is about 125.8481205181.

The spelling of 1993151 in words is "one million, nine hundred ninety-three thousand, one hundred fifty-one".