3445991 has 8 divisors (see below), whose sum is σ = 3600000. Its totient is φ = 3294720.

The previous prime is 3445963. The next prime is 3445999. The reversal of 3445991 is 1995443.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3445991 - 2¹⁰ = 3444967 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3445999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2135 + ... + 3383.

It is an arithmetic number, because the mean of its divisors is an integer number (450000).

Almost surely, 2^3445991 is an apocalyptic number.

3445991 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3445991 is a deficient number, since it is larger than the sum of its proper divisors (154009).

3445991 is a wasteful number, since it uses less digits than its factorization.

3445991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369.

The product of its digits is 19440, while the sum is 35.

The square root of 3445991 is about 1856.3380618842. The cubic root of 3445991 is about 151.0444294213.

The spelling of 3445991 in words is "three million, four hundred forty-five thousand, nine hundred ninety-one".