157775879 has 2 divisors, whose sum is σ = 157775880. Its totient is φ = 157775878.

The previous prime is 157775857. The next prime is 157775899. The reversal of 157775879 is 978577751.

It is a happy number.

157775879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (978577751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157775879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157775819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78887939 + 78887940.

It is an arithmetic number, because the mean of its divisors is an integer number (78887940).

Almost surely, 2^157775879 is an apocalyptic number.

157775879 is a deficient number, since it is larger than the sum of its proper divisors (1).

157775879 is an equidigital number, since it uses as much as digits as its factorization.

157775879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4321800, while the sum is 56.

The square root of 157775879 is about 12560.8868715549. The cubic root of 157775879 is about 540.3562795152.

The spelling of 157775879 in words is "one hundred fifty-seven million, seven hundred seventy-five thousand, eight hundred seventy-nine".