6901491 has 4 divisors (see below), whose sum is σ = 9201992. Its totient is φ = 4600992.

The previous prime is 6901463. The next prime is 6901511. The reversal of 6901491 is 1941096.

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

It is not a de Polignac number, because 6901491 - 2⁵ = 6901459 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

6901491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6901441) 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, 1150246 + ... + 1150251.

It is an arithmetic number, because the mean of its divisors is an integer number (2300498).

Almost surely, 2^6901491 is an apocalyptic number.

6901491 is a deficient number, since it is larger than the sum of its proper divisors (2300501).

6901491 is a wasteful number, since it uses less digits than its factorization.

6901491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300500.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 6901491 is about 2627.0688989823. The cubic root of 6901491 is about 190.3915379304.

The spelling of 6901491 in words is "six million, nine hundred one thousand, four hundred ninety-one".