1913157 has 6 divisors (see below), whose sum is σ = 2763462. Its totient is φ = 1275432.

The previous prime is 1913147. The next prime is 1913161. The reversal of 1913157 is 7513191.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1887876 + 25281 = 1374^2 + 159^2 .

It is not a de Polignac number, because 1913157 - 2¹⁰ = 1912133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1913157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106278 + ... + 106295.

It is an arithmetic number, because the mean of its divisors is an integer number (460577).

2^1913157 is an apocalyptic number.

It is an amenable number.

1913157 is a deficient number, since it is larger than the sum of its proper divisors (850305).

1913157 is a wasteful number, since it uses less digits than its factorization.

1913157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212579 (or 212576 counting only the distinct ones).

The product of its digits is 945, while the sum is 27.

The square root of 1913157 is about 1383.1691870484. The cubic root of 1913157 is about 124.1414661908.

The spelling of 1913157 in words is "one million, nine hundred thirteen thousand, one hundred fifty-seven".