6900242891 has 4 divisors (see below), whose sum is σ = 6977773800. Its totient is φ = 6822711984.

The previous prime is 6900242821. The next prime is 6900242917. The reversal of 6900242891 is 1982420096.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6900242891 is a prime.

It is a super-2 number, since 2×6900242891² = 95226703909592075762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6900242801) 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, 38765321 + ... + 38765498.

It is an arithmetic number, because the mean of its divisors is an integer number (1744443450).

Almost surely, 2^6900242891 is an apocalyptic number.

6900242891 is a deficient number, since it is larger than the sum of its proper divisors (77530909).

6900242891 is an equidigital number, since it uses as much as digits as its factorization.

6900242891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77530908.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 6900242891 is about 83067.7006483266. The cubic root of 6900242891 is about 1903.8006003778.

The spelling of 6900242891 in words is "six billion, nine hundred million, two hundred forty-two thousand, eight hundred ninety-one".