7149999 has 4 divisors (see below), whose sum is σ = 9533336. Its totient is φ = 4766664.

The previous prime is 7149983. The next prime is 7150007. The reversal of 7149999 is 9999417.

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

It is not a de Polignac number, because 7149999 - 2⁴ = 7149983 is a prime.

It is a super-2 number, since 2×7149999² = 102244971400002, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

7149999 is a modest number, since divided by 9999 gives 714 as remainder.

7149999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7149929) 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, 1191664 + ... + 1191669.

It is an arithmetic number, because the mean of its divisors is an integer number (2383334).

Almost surely, 2^7149999 is an apocalyptic number.

7149999 is a deficient number, since it is larger than the sum of its proper divisors (2383337).

7149999 is a wasteful number, since it uses less digits than its factorization.

7149999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383336.

The product of its digits is 183708, while the sum is 48.

The square root of 7149999 is about 2673.9482044348. The cubic root of 7149999 is about 192.6498434137.

The spelling of 7149999 in words is "seven million, one hundred forty-nine thousand, nine hundred ninety-nine".