78073967 has 2 divisors, whose sum is σ = 78073968. Its totient is φ = 78073966.

The previous prime is 78073951. The next prime is 78073981. The reversal of 78073967 is 76937087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78073967 - 2⁴ = 78073951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78073927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39036983 + 39036984.

It is an arithmetic number, because the mean of its divisors is an integer number (39036984).

Almost surely, 2^78073967 is an apocalyptic number.

78073967 is a deficient number, since it is larger than the sum of its proper divisors (1).

78073967 is an equidigital number, since it uses as much as digits as its factorization.

78073967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 78073967 is about 8835.9474308079. The cubic root of 78073967 is about 427.4008835112.

It can be divided in two parts, 780 and 73967, that added together give a palindrome (74747).

The spelling of 78073967 in words is "seventy-eight million, seventy-three thousand, nine hundred sixty-seven".