157812869 has 2 divisors, whose sum is σ = 157812870. Its totient is φ = 157812868.

The previous prime is 157812859. The next prime is 157812871. The reversal of 157812869 is 968218751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157803844 + 9025 = 12562^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 157812869 - 2¹⁶ = 157747333 is a prime.

It is a super-2 number, since 2×157812869² = 49809803244022322, which contains 22 as substring.

Together with 157812871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157812839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78906434 + 78906435.

It is an arithmetic number, because the mean of its divisors is an integer number (78906435).

Almost surely, 2^157812869 is an apocalyptic number.

It is an amenable number.

157812869 is a deficient number, since it is larger than the sum of its proper divisors (1).

157812869 is an equidigital number, since it uses as much as digits as its factorization.

157812869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 47.

The square root of 157812869 is about 12562.3592131415. The cubic root of 157812869 is about 540.3985044254.

The spelling of 157812869 in words is "one hundred fifty-seven million, eight hundred twelve thousand, eight hundred sixty-nine".