7149639917 has 4 divisors (see below), whose sum is σ = 8171017056. Its totient is φ = 6128262780.

The previous prime is 7149639877. The next prime is 7149639947. The reversal of 7149639917 is 7199369417.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7199369417 = 3559 ⋅2022863.

It is a cyclic number.

It is not a de Polignac number, because 7149639917 - 2⁶ = 7149639853 is a prime.

It is a super-2 number, since 2×7149639917² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7149639947) 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, 510688559 + ... + 510688572.

It is an arithmetic number, because the mean of its divisors is an integer number (2042754264).

Almost surely, 2^7149639917 is an apocalyptic number.

It is an amenable number.

7149639917 is a deficient number, since it is larger than the sum of its proper divisors (1021377139).

7149639917 is a wasteful number, since it uses less digits than its factorization.

7149639917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021377138.

The product of its digits is 2571912, while the sum is 56.

The square root of 7149639917 is about 84555.5433842158. The cubic root of 7149639917 is about 1926.4661831110.

The spelling of 7149639917 in words is "seven billion, one hundred forty-nine million, six hundred thirty-nine thousand, nine hundred seventeen".