157921343 has 2 divisors, whose sum is σ = 157921344. Its totient is φ = 157921342.

The previous prime is 157921321. The next prime is 157921349. The reversal of 157921343 is 343129751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157921343 - 2¹⁰ = 157920319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157921349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78960671 + 78960672.

It is an arithmetic number, because the mean of its divisors is an integer number (78960672).

Almost surely, 2^157921343 is an apocalyptic number.

157921343 is a deficient number, since it is larger than the sum of its proper divisors (1).

157921343 is an equidigital number, since it uses as much as digits as its factorization.

157921343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 157921343 is about 12566.6758930116. The cubic root of 157921343 is about 540.5222918835.

It can be divided in two parts, 1579 and 21343, that added together give a palindrome (22922).

The spelling of 157921343 in words is "one hundred fifty-seven million, nine hundred twenty-one thousand, three hundred forty-three".