1993157 has 8 divisors (see below), whose sum is σ = 2189760. Its totient is φ = 1805760.

The previous prime is 1993151. The next prime is 1993163. The reversal of 1993157 is 7513991.

It is an interprime number because it is at equal distance from previous prime (1993151) and next prime (1993163).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1993157 - 2¹⁸ = 1731013 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844 + ... + 2717.

It is an arithmetic number, because the mean of its divisors is an integer number (273720).

2^1993157 is an apocalyptic number.

It is an amenable number.

1993157 is a deficient number, since it is larger than the sum of its proper divisors (196603).

1993157 is a wasteful number, since it uses less digits than its factorization.

1993157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603.

The product of its digits is 8505, while the sum is 35.

The square root of 1993157 is about 1411.7921235083. The cubic root of 1993157 is about 125.8482467985.

The spelling of 1993157 in words is "one million, nine hundred ninety-three thousand, one hundred fifty-seven".