78270373 has 4 divisors (see below), whose sum is σ = 78702988. Its totient is φ = 77837760.

The previous prime is 78270343. The next prime is 78270377. The reversal of 78270373 is 37307287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37307287 = 89 ⋅419183.

It can be written as a sum of positive squares in 2 ways, for example, as 39917124 + 38353249 = 6318^2 + 6193^2 .

It is a cyclic number.

It is not a de Polignac number, because 78270373 - 2⁵ = 78270341 is a prime.

It is a super-2 number, since 2×78270373² = 12252502579118258, 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 (78270377) 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, 216036 + ... + 216397.

It is an arithmetic number, because the mean of its divisors is an integer number (19675747).

Almost surely, 2^78270373 is an apocalyptic number.

It is an amenable number.

78270373 is a deficient number, since it is larger than the sum of its proper divisors (432615).

78270373 is a wasteful number, since it uses less digits than its factorization.

78270373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432614.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 78270373 is about 8847.0544815775. The cubic root of 78270373 is about 427.7589789956.

The spelling of 78270373 in words is "seventy-eight million, two hundred seventy thousand, three hundred seventy-three".