7149813 has 8 divisors (see below), whose sum is σ = 10399776. Its totient is φ = 4333200.

The previous prime is 7149811. The next prime is 7149817. The reversal of 7149813 is 3189417.

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

It is not a de Polignac number, because 7149813 - 2¹ = 7149811 is a prime.

It is a super-2 number, since 2×7149813² = 102239651869938, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 216661 = 7149813 / (7 + 1 + 4 + 9 + 8 + 1 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7149811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108298 + ... + 108363.

It is an arithmetic number, because the mean of its divisors is an integer number (1299972).

Almost surely, 2^7149813 is an apocalyptic number.

It is an amenable number.

7149813 is a deficient number, since it is larger than the sum of its proper divisors (3249963).

7149813 is a wasteful number, since it uses less digits than its factorization.

7149813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216675.

The product of its digits is 6048, while the sum is 33.

The square root of 7149813 is about 2673.9134241781. The cubic root of 7149813 is about 192.6481728689.

The spelling of 7149813 in words is "seven million, one hundred forty-nine thousand, eight hundred thirteen".