78367673 has 4 divisors (see below), whose sum is σ = 78578148. Its totient is φ = 78157200.

The previous prime is 78367651. The next prime is 78367691. The reversal of 78367673 is 37676387.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37676387 = 7 ⋅5382341.

It can be written as a sum of positive squares in 2 ways, for example, as 23785129 + 54582544 = 4877^2 + 7388^2 .

It is a cyclic number.

It is not a de Polignac number, because 78367673 - 2¹⁰ = 78366649 is a prime.

It is a super-2 number, since 2×78367673² = 12282984342869858, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78367613) 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, 104678 + ... + 105423.

It is an arithmetic number, because the mean of its divisors is an integer number (19644537).

Almost surely, 2^78367673 is an apocalyptic number.

It is an amenable number.

78367673 is a deficient number, since it is larger than the sum of its proper divisors (210475).

78367673 is a wasteful number, since it uses less digits than its factorization.

78367673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210474.

The product of its digits is 889056, while the sum is 47.

The square root of 78367673 is about 8852.5517790070. The cubic root of 78367673 is about 427.9361584837.

The spelling of 78367673 in words is "seventy-eight million, three hundred sixty-seven thousand, six hundred seventy-three".