78401167 has 4 divisors (see below), whose sum is σ = 84432040. Its totient is φ = 72370296.

The previous prime is 78401153. The next prime is 78401171. The reversal of 78401167 is 76110487.

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

It is a cyclic number.

It is not a de Polignac number, because 78401167 - 2¹¹ = 78399119 is a prime.

It is a super-2 number, since 2×78401167² = 12293485973923778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78401117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3015417 + ... + 3015442.

It is an arithmetic number, because the mean of its divisors is an integer number (21108010).

Almost surely, 2^78401167 is an apocalyptic number.

78401167 is a deficient number, since it is larger than the sum of its proper divisors (6030873).

78401167 is a wasteful number, since it uses less digits than its factorization.

78401167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6030872.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 78401167 is about 8854.4433478339. The cubic root of 78401167 is about 427.9971158131.

The spelling of 78401167 in words is "seventy-eight million, four hundred one thousand, one hundred sixty-seven".