6987213405 has 48 divisors (see below), whose sum is σ = 12656666880. Its totient is φ = 3562360704.

The previous prime is 6987213383. The next prime is 6987213407. The reversal of 6987213405 is 5043127896.

6987213405 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6987213405 - 2¹² = 6987209309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

6987213405 is strictly pandigital in base 10.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6987213407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52531 + ... + 129359.

It is an arithmetic number, because the mean of its divisors is an integer number (263680560).

It is a 1-persistent number, because it is pandigital, but 2⋅6987213405 = 13974426810 is not.

Almost surely, 2^6987213405 is an apocalyptic number.

It is an amenable number.

6987213405 is a deficient number, since it is larger than the sum of its proper divisors (5669453475).

6987213405 is a wasteful number, since it uses less digits than its factorization.

6987213405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76930 (or 76927 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 6987213405 is about 83589.5532049311. The cubic root of 6987213405 is about 1911.7657168346.

The spelling of 6987213405 in words is "six billion, nine hundred eighty-seven million, two hundred thirteen thousand, four hundred five".