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157121759 is a prime number
BaseRepresentation
bin10010101110101…
…11110011011111
3101221122121112102
421113113303133
5310210344014
623331355315
73615340634
oct1127276337
9357577472
10157121759
11807669a3
1244752b3b
1326723672
1416c2018b
15dbd98de
hex95d7cdf

157121759 has 2 divisors, whose sum is σ = 157121760. Its totient is φ = 157121758.

The previous prime is 157121749. The next prime is 157121771. The reversal of 157121759 is 957121751.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-157121759 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157121749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78560879 + 78560880.

It is an arithmetic number, because the mean of its divisors is an integer number (78560880).

Almost surely, 2157121759 is an apocalyptic number.

157121759 is a deficient number, since it is larger than the sum of its proper divisors (1).

157121759 is an equidigital number, since it uses as much as digits as its factorization.

157121759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22050, while the sum is 38.

The square root of 157121759 is about 12534.8218575295. The cubic root of 157121759 is about 539.6084942291.

It can be divided in two parts, 15712 and 1759, that added together give a palindrome (17471).

The spelling of 157121759 in words is "one hundred fifty-seven million, one hundred twenty-one thousand, seven hundred fifty-nine".