6989802457 has 4 divisors (see below), whose sum is σ = 7625239056. Its totient is φ = 6354365860.

The previous prime is 6989802427. The next prime is 6989802461. The reversal of 6989802457 is 7542089896.

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.

It is a cyclic number.

It is not a de Polignac number, because 6989802457 - 2⁷ = 6989802329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6989802427) 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, 317718283 + ... + 317718304.

It is an arithmetic number, because the mean of its divisors is an integer number (1906309764).

Almost surely, 2^6989802457 is an apocalyptic number.

It is an amenable number.

6989802457 is a deficient number, since it is larger than the sum of its proper divisors (635436599).

6989802457 is a wasteful number, since it uses less digits than its factorization.

6989802457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635436598.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The square root of 6989802457 is about 83605.0384665900. The cubic root of 6989802457 is about 1912.0018171386.

The spelling of 6989802457 in words is "six billion, nine hundred eighty-nine million, eight hundred two thousand, four hundred fifty-seven".