78163237 has 2 divisors, whose sum is σ = 78163238. Its totient is φ = 78163236.

The previous prime is 78163231. The next prime is 78163243. The reversal of 78163237 is 73236187.

It is a balanced prime because it is at equal distance from previous prime (78163231) and next prime (78163243).

It can be written as a sum of positive squares in only one way, i.e., 76895361 + 1267876 = 8769^2 + 1126^2 .

It is a cyclic number.

It is not a de Polignac number, because 78163237 - 2⁷ = 78163109 is a prime.

It is a super-2 number, since 2×78163237² = 12218983236636338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78163196 and 78163205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78163231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39081618 + 39081619.

It is an arithmetic number, because the mean of its divisors is an integer number (39081619).

Almost surely, 2^78163237 is an apocalyptic number.

It is an amenable number.

78163237 is a deficient number, since it is larger than the sum of its proper divisors (1).

78163237 is an equidigital number, since it uses as much as digits as its factorization.

78163237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 78163237 is about 8840.9975115934. The cubic root of 78163237 is about 427.5637186010.

It can be divided in two parts, 78163 and 237, that added together give a square (78400 = 280²).

The spelling of 78163237 in words is "seventy-eight million, one hundred sixty-three thousand, two hundred thirty-seven".