78073971 has 8 divisors (see below), whose sum is σ = 104859024. Its totient is φ = 51669120.

The previous prime is 78073967. The next prime is 78073981. The reversal of 78073971 is 17937087.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78073971 - 2² = 78073967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78073901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94570 + ... + 95391.

It is an arithmetic number, because the mean of its divisors is an integer number (13107378).

Almost surely, 2^78073971 is an apocalyptic number.

78073971 is a deficient number, since it is larger than the sum of its proper divisors (26785053).

78073971 is a wasteful number, since it uses less digits than its factorization.

78073971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190101.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 78073971 is about 8835.9476571560. The cubic root of 78073971 is about 427.4008908103.

The spelling of 78073971 in words is "seventy-eight million, seventy-three thousand, nine hundred seventy-one".