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157669 is a prime number
BaseRepresentation
bin100110011111100101
322000021121
4212133211
520021134
63213541
71224451
oct463745
9260247
10157669
11a8506
12772b1
13569c5
1441661
1531ab4
hex267e5

157669 has 2 divisors, whose sum is σ = 157670. Its totient is φ = 157668.

The previous prime is 157667. The next prime is 157679. The reversal of 157669 is 966751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113569 + 44100 = 337^2 + 210^2 .

It is an emirp because it is prime and its reverse (966751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157669 - 21 = 157667 is a prime.

It is a super-2 number, since 2×1576692 = 49719027122, which contains 22 as substring.

Together with 157667, it forms a pair of twin primes.

157669 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157667) 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, 78834 + 78835.

It is an arithmetic number, because the mean of its divisors is an integer number (78835).

2157669 is an apocalyptic number.

It is an amenable number.

157669 is a deficient number, since it is larger than the sum of its proper divisors (1).

157669 is an equidigital number, since it uses as much as digits as its factorization.

157669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 34.

The square root of 157669 is about 397.0755595601. The cubic root of 157669 is about 54.0234237657.

The spelling of 157669 in words is "one hundred fifty-seven thousand, six hundred sixty-nine".