6987457 has 4 divisors (see below), whose sum is σ = 7150000. Its totient is φ = 6824916.

The previous prime is 6987451. The next prime is 6987473. The reversal of 6987457 is 7547896.

It is a happy number.

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 6987457 - 2¹¹ = 6985409 is a prime.

It is a Duffinian number.

6987457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6987451) 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, 81207 + ... + 81292.

It is an arithmetic number, because the mean of its divisors is an integer number (1787500).

Almost surely, 2^6987457 is an apocalyptic number.

It is an amenable number.

6987457 is a deficient number, since it is larger than the sum of its proper divisors (162543).

6987457 is a wasteful number, since it uses less digits than its factorization.

6987457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162542.

The product of its digits is 423360, while the sum is 46.

The square root of 6987457 is about 2643.3798440633. The cubic root of 6987457 is about 191.1787933186.

The spelling of 6987457 in words is "six million, nine hundred eighty-seven thousand, four hundred fifty-seven".