78273061 has 4 divisors (see below), whose sum is σ = 78368992. Its totient is φ = 78177132.

The previous prime is 78273037. The next prime is 78273073. The reversal of 78273061 is 16037287.

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: 16037287 = 7 ⋅2291041.

It is a cyclic number.

It is not a de Polignac number, because 78273061 - 2¹⁵ = 78240293 is a prime.

It is a super-4 number, since 4×78273061⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78273011) 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, 46731 + ... + 48376.

It is an arithmetic number, because the mean of its divisors is an integer number (19592248).

Almost surely, 2^78273061 is an apocalyptic number.

It is an amenable number.

78273061 is a deficient number, since it is larger than the sum of its proper divisors (95931).

78273061 is an equidigital number, since it uses as much as digits as its factorization.

78273061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95930.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 78273061 is about 8847.2063952414. The cubic root of 78273061 is about 427.7638757100.

The spelling of 78273061 in words is "seventy-eight million, two hundred seventy-three thousand, sixty-one".