270778891 has 4 divisors (see below), whose sum is σ = 276540192. Its totient is φ = 265017592.

The previous prime is 270778889. The next prime is 270778901. The reversal of 270778891 is 198877072.

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 270778891 - 2¹ = 270778889 is a prime.

It is a super-2 number, since 2×270778891² = 146642415622379762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (270778841) 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, 2880580 + ... + 2880673.

It is an arithmetic number, because the mean of its divisors is an integer number (69135048).

Almost surely, 2^270778891 is an apocalyptic number.

270778891 is a deficient number, since it is larger than the sum of its proper divisors (5761301).

270778891 is an equidigital number, since it uses as much as digits as its factorization.

270778891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5761300.

The product of its (nonzero) digits is 395136, while the sum is 49.

The square root of 270778891 is about 16455.3605551504. The cubic root of 270778891 is about 646.9513176576.

The spelling of 270778891 in words is "two hundred seventy million, seven hundred seventy-eight thousand, eight hundred ninety-one".