6900721349 has 4 divisors (see below), whose sum is σ = 7200752736. Its totient is φ = 6600689964.

The previous prime is 6900721339. The next prime is 6900721391. The reversal of 6900721349 is 9431270096.

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 6900721349 - 2¹² = 6900717253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6900721339) 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, 150015659 + ... + 150015704.

It is an arithmetic number, because the mean of its divisors is an integer number (1800188184).

Almost surely, 2^6900721349 is an apocalyptic number.

It is an amenable number.

6900721349 is a deficient number, since it is larger than the sum of its proper divisors (300031387).

6900721349 is a wasteful number, since it uses less digits than its factorization.

6900721349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300031386.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 6900721349 is about 83070.5805264415. The cubic root of 6900721349 is about 1903.8446020934.

The spelling of 6900721349 in words is "six billion, nine hundred million, seven hundred twenty-one thousand, three hundred forty-nine".