78470131 has 2 divisors, whose sum is σ = 78470132. Its totient is φ = 78470130.

The previous prime is 78470129. The next prime is 78470159. The reversal of 78470131 is 13107487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78470131 - 2¹ = 78470129 is a prime.

It is a super-2 number, since 2×78470131² = 12315122918314322, which contains 22 as substring.

Together with 78470129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 78470093 and 78470102.

It is not a weakly prime, because it can be changed into another prime (78470111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39235065 + 39235066.

It is an arithmetic number, because the mean of its divisors is an integer number (39235066).

Almost surely, 2^78470131 is an apocalyptic number.

78470131 is a deficient number, since it is larger than the sum of its proper divisors (1).

78470131 is an equidigital number, since it uses as much as digits as its factorization.

78470131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 78470131 is about 8858.3368077761. The cubic root of 78470131 is about 428.1225720359.

The spelling of 78470131 in words is "seventy-eight million, four hundred seventy thousand, one hundred thirty-one".