7139091 has 4 divisors (see below), whose sum is σ = 9518792. Its totient is φ = 4759392.

The previous prime is 7139089. The next prime is 7139101. The reversal of 7139091 is 1909317.

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

It is not a de Polignac number, because 7139091 - 2¹ = 7139089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7139071) 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, 1189846 + ... + 1189851.

It is an arithmetic number, because the mean of its divisors is an integer number (2379698).

Almost surely, 2^7139091 is an apocalyptic number.

7139091 is a deficient number, since it is larger than the sum of its proper divisors (2379701).

7139091 is a wasteful number, since it uses less digits than its factorization.

7139091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379700.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 7139091 is about 2671.9077454134. The cubic root of 7139091 is about 192.5518250299.

The spelling of 7139091 in words is "seven million, one hundred thirty-nine thousand, ninety-one".