70278427 has 4 divisors (see below), whose sum is σ = 71268336. Its totient is φ = 69288520.

The previous prime is 70278407. The next prime is 70278431. The reversal of 70278427 is 72487207.

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 70278427 - 2¹¹ = 70276379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70278407) 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, 494848 + ... + 494989.

It is an arithmetic number, because the mean of its divisors is an integer number (17817084).

Almost surely, 2^70278427 is an apocalyptic number.

70278427 is a deficient number, since it is larger than the sum of its proper divisors (989909).

70278427 is an equidigital number, since it uses as much as digits as its factorization.

70278427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989908.

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 70278427 is about 8383.2229482461. Note that the first 3 decimals coincide. The cubic root of 70278427 is about 412.6742247812.

The spelling of 70278427 in words is "seventy million, two hundred seventy-eight thousand, four hundred twenty-seven".