157749811 has 2 divisors, whose sum is σ = 157749812. Its totient is φ = 157749810.

The previous prime is 157749797. The next prime is 157749853. The reversal of 157749811 is 118947751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157749811 - 2²¹ = 155652659 is a prime.

It is not a weakly prime, because it can be changed into another prime (157749871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78874905 + 78874906.

It is an arithmetic number, because the mean of its divisors is an integer number (78874906).

Almost surely, 2^157749811 is an apocalyptic number.

157749811 is a deficient number, since it is larger than the sum of its proper divisors (1).

157749811 is an equidigital number, since it uses as much as digits as its factorization.

157749811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 43.

The square root of 157749811 is about 12559.8491631070. The cubic root of 157749811 is about 540.3265183472.

The spelling of 157749811 in words is "one hundred fifty-seven million, seven hundred forty-nine thousand, eight hundred eleven".