1344886991 has 8 divisors (see below), whose sum is σ = 1537238304. Its totient is φ = 1152591840.

The previous prime is 1344886987. The next prime is 1344886993. The reversal of 1344886991 is 1996884431.

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 1344886991 - 2² = 1344886987 is a prime.

It is a super-2 number, since 2×1344886991² = 3617442037122068162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1344886993) 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, 74621 + ... + 90873.

It is an arithmetic number, because the mean of its divisors is an integer number (192154788).

Almost surely, 2^1344886991 is an apocalyptic number.

1344886991 is a deficient number, since it is larger than the sum of its proper divisors (192351313).

1344886991 is a wasteful number, since it uses less digits than its factorization.

1344886991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28081.

The product of its digits is 1492992, while the sum is 53.

The square root of 1344886991 is about 36672.7008958980. The cubic root of 1344886991 is about 1103.8123890812.

The spelling of 1344886991 in words is "one billion, three hundred forty-four million, eight hundred eighty-six thousand, nine hundred ninety-one".