157798079 has 4 divisors (see below), whose sum is σ = 158359920. Its totient is φ = 157236240.

The previous prime is 157798073. The next prime is 157798087. The reversal of 157798079 is 970897751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157798079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157798079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157798073) 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 in 3 ways as a sum of consecutive naturals, for example, 280499 + ... + 281060.

It is an arithmetic number, because the mean of its divisors is an integer number (39589980).

Almost surely, 2^157798079 is an apocalyptic number.

157798079 is a deficient number, since it is larger than the sum of its proper divisors (561841).

157798079 is an equidigital number, since it uses as much as digits as its factorization.

157798079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561840.

The product of its (nonzero) digits is 1111320, while the sum is 53.

The square root of 157798079 is about 12561.7705360351. The cubic root of 157798079 is about 540.3816221022.

The spelling of 157798079 in words is "one hundred fifty-seven million, seven hundred ninety-eight thousand, seventy-nine".