6996021749 has 4 divisors (see below), whose sum is σ = 7364233440. Its totient is φ = 6627810060.

The previous prime is 6996021727. The next prime is 6996021763. The reversal of 6996021749 is 9471206996.

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 6996021749 - 2⁸ = 6996021493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6996021749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6996021779) 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, 184105817 + ... + 184105854.

It is an arithmetic number, because the mean of its divisors is an integer number (1841058360).

Almost surely, 2^6996021749 is an apocalyptic number.

It is an amenable number.

6996021749 is a deficient number, since it is larger than the sum of its proper divisors (368211691).

6996021749 is a wasteful number, since it uses less digits than its factorization.

6996021749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368211690.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 6996021749 is about 83642.2246774917. The cubic root of 6996021749 is about 1912.5687274147.

The spelling of 6996021749 in words is "six billion, nine hundred ninety-six million, twenty-one thousand, seven hundred forty-nine".