78263071 has 4 divisors (see below), whose sum is σ = 82382200. Its totient is φ = 74143944.

The previous prime is 78263051. The next prime is 78263093. The reversal of 78263071 is 17036287.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78263071 - 2¹¹ = 78261023 is a prime.

It is a super-2 number, since 2×78263071² = 12250216564702082, 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 (78263011) 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, 2059536 + ... + 2059573.

It is an arithmetic number, because the mean of its divisors is an integer number (20595550).

Almost surely, 2^78263071 is an apocalyptic number.

78263071 is a deficient number, since it is larger than the sum of its proper divisors (4119129).

78263071 is a wasteful number, since it uses less digits than its factorization.

78263071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4119128.

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

The square root of 78263071 is about 8846.6417922283. The cubic root of 78263071 is about 427.7456764177.

The spelling of 78263071 in words is "seventy-eight million, two hundred sixty-three thousand, seventy-one".