1000157189 has 2 divisors, whose sum is σ = 1000157190. Its totient is φ = 1000157188.

The previous prime is 1000157183. The next prime is 1000157267. The reversal of 1000157189 is 9817510001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 652036225 + 348120964 = 25535^2 + 18658^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000157189 - 2⁸ = 1000156933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000157183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500078594 + 500078595.

It is an arithmetic number, because the mean of its divisors is an integer number (500078595).

Almost surely, 2^1000157189 is an apocalyptic number.

It is an amenable number.

1000157189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000157189 is an equidigital number, since it uses as much as digits as its factorization.

1000157189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 1000157189 is about 31625.2618803386. The cubic root of 1000157189 is about 1000.0523935882.

The spelling of 1000157189 in words is "one billion, one hundred fifty-seven thousand, one hundred eighty-nine".