1178878357 has 2 divisors, whose sum is σ = 1178878358. Its totient is φ = 1178878356.

The previous prime is 1178878193. The next prime is 1178878397. The reversal of 1178878357 is 7538788711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1055535121 + 123343236 = 32489^2 + 11106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1178878357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1178878298 and 1178878307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1178878397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589439178 + 589439179.

It is an arithmetic number, because the mean of its divisors is an integer number (589439179).

Almost surely, 2^1178878357 is an apocalyptic number.

It is an amenable number.

1178878357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1178878357 is an equidigital number, since it uses as much as digits as its factorization.

1178878357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2634240, while the sum is 55.

The square root of 1178878357 is about 34334.7980480445. The cubic root of 1178878357 is about 1056.3868786024.

The spelling of 1178878357 in words is "one billion, one hundred seventy-eight million, eight hundred seventy-eight thousand, three hundred fifty-seven".