79198749 has 24 divisors (see below), whose sum is σ = 136489920. Its totient is φ = 45255672.

The previous prime is 79198747. The next prime is 79198751. The reversal of 79198749 is 94789197.

It is an interprime number because it is at equal distance from previous prime (79198747) and next prime (79198751).

It is not a de Polignac number, because 79198749 - 2¹ = 79198747 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 79198695 and 79198704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79198747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28609 + ... + 31254.

It is an arithmetic number, because the mean of its divisors is an integer number (5687080).

Almost surely, 2^79198749 is an apocalyptic number.

It is an amenable number.

79198749 is a deficient number, since it is larger than the sum of its proper divisors (57291171).

79198749 is a wasteful number, since it uses less digits than its factorization.

79198749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59886 (or 59873 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 79198749 is about 8899.3678989016. The cubic root of 79198749 is about 429.4435726945.

The spelling of 79198749 in words is "seventy-nine million, one hundred ninety-eight thousand, seven hundred forty-nine".