3149991 has 36 divisors (see below), whose sum is σ = 5233800. Its totient is φ = 1819584.

The previous prime is 3149983. The next prime is 3149999. The reversal of 3149991 is 1999413.

It is an interprime number because it is at equal distance from previous prime (3149983) and next prime (3149999).

It is not a de Polignac number, because 3149991 - 2³ = 3149983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3149999) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 28845 + ... + 28953.

Almost surely, 2^3149991 is an apocalyptic number.

3149991 is a deficient number, since it is larger than the sum of its proper divisors (2083809).

3149991 is a wasteful number, since it uses less digits than its factorization.

3149991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 144 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 3149991 is about 1774.8213994653. The cubic root of 3149991 is about 146.5895812784.

The spelling of 3149991 in words is "three million, one hundred forty-nine thousand, nine hundred ninety-one".