1923157 has 2 divisors, whose sum is σ = 1923158. Its totient is φ = 1923156.

The previous prime is 1923151. The next prime is 1923167. The reversal of 1923157 is 7513291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1653796 + 269361 = 1286^2 + 519^2 .

It is a cyclic number.

It is not a de Polignac number, because 1923157 - 2⁷ = 1923029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1923151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961578 + 961579.

It is an arithmetic number, because the mean of its divisors is an integer number (961579).

2^1923157 is an apocalyptic number.

It is an amenable number.

1923157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1923157 is an equidigital number, since it uses as much as digits as its factorization.

1923157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 28.

The square root of 1923157 is about 1386.7793624077. The cubic root of 1923157 is about 124.3573846924.

It can be divided in two parts, 1923 and 157, that added together give a triangular number (2080 = T₆₄).

The spelling of 1923157 in words is "one million, nine hundred twenty-three thousand, one hundred fifty-seven".