157720063 has 2 divisors, whose sum is σ = 157720064. Its totient is φ = 157720062.

The previous prime is 157720051. The next prime is 157720091. The reversal of 157720063 is 360027751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157720063 - 2²¹ = 155622911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157720663) 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, 78860031 + 78860032.

It is an arithmetic number, because the mean of its divisors is an integer number (78860032).

Almost surely, 2^157720063 is an apocalyptic number.

157720063 is a deficient number, since it is larger than the sum of its proper divisors (1).

157720063 is an equidigital number, since it uses as much as digits as its factorization.

157720063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 157720063 is about 12558.6648573803. The cubic root of 157720063 is about 540.2925518115.

The spelling of 157720063 in words is "one hundred fifty-seven million, seven hundred twenty thousand, sixty-three".