78370973 has 4 divisors (see below), whose sum is σ = 79103520. Its totient is φ = 77638428.

The previous prime is 78370961. The next prime is 78370993. The reversal of 78370973 is 37907387.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37907387 = 7 ⋅5415341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78370973 is a prime.

It is a super-2 number, since 2×78370973² = 12284018817933458, 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 (78370993) 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, 366113 + ... + 366326.

It is an arithmetic number, because the mean of its divisors is an integer number (19775880).

Almost surely, 2^78370973 is an apocalyptic number.

It is an amenable number.

78370973 is a deficient number, since it is larger than the sum of its proper divisors (732547).

78370973 is a wasteful number, since it uses less digits than its factorization.

78370973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732546.

The product of its (nonzero) digits is 222264, while the sum is 44.

The square root of 78370973 is about 8852.7381639807. The cubic root of 78370973 is about 427.9421650824.

The spelling of 78370973 in words is "seventy-eight million, three hundred seventy thousand, nine hundred seventy-three".