788640157 has 2 divisors, whose sum is σ = 788640158. Its totient is φ = 788640156.

The previous prime is 788640137. The next prime is 788640161. The reversal of 788640157 is 751046887.

788640157 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 can be written as a sum of positive squares in only one way, i.e., 784616121 + 4024036 = 28011^2 + 2006^2 .

It is a cyclic number.

It is not a de Polignac number, because 788640157 - 2⁷ = 788640029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (788640137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394320078 + 394320079.

It is an arithmetic number, because the mean of its divisors is an integer number (394320079).

Almost surely, 2^788640157 is an apocalyptic number.

It is an amenable number.

788640157 is a deficient number, since it is larger than the sum of its proper divisors (1).

788640157 is an equidigital number, since it uses as much as digits as its factorization.

788640157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 788640157 is about 28082.7377048606. The cubic root of 788640157 is about 923.9028265126.

The spelling of 788640157 in words is "seven hundred eighty-eight million, six hundred forty thousand, one hundred fifty-seven".