6900139 has 4 divisors (see below), whose sum is σ = 6922224. Its totient is φ = 6878056.

The previous prime is 6900121. The next prime is 6900149. The reversal of 6900139 is 9310096.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6900139 - 2¹⁹ = 6375851 is a prime.

It is a super-2 number, since 2×6900139² = 95223836438642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6900149) 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, 10567 + ... + 11200.

It is an arithmetic number, because the mean of its divisors is an integer number (1730556).

Almost surely, 2^6900139 is an apocalyptic number.

6900139 is a deficient number, since it is larger than the sum of its proper divisors (22085).

6900139 is a wasteful number, since it uses less digits than its factorization.

6900139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22084.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 6900139 is about 2626.8115653773. The cubic root of 6900139 is about 190.3791045703.

The spelling of 6900139 in words is "six million, nine hundred thousand, one hundred thirty-nine".