79740545 has 4 divisors (see below), whose sum is σ = 95688660. Its totient is φ = 63792432.

The previous prime is 79740539. The next prime is 79740569. The reversal of 79740545 is 54504797.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44302336 + 35438209 = 6656^2 + 5953^2 .

It is a cyclic number.

It is not a de Polignac number, because 79740545 - 2¹⁶ = 79675009 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7974050 + ... + 7974059.

It is an arithmetic number, because the mean of its divisors is an integer number (23922165).

Almost surely, 2^79740545 is an apocalyptic number.

It is an amenable number.

79740545 is a deficient number, since it is larger than the sum of its proper divisors (15948115).

79740545 is a wasteful number, since it uses less digits than its factorization.

79740545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15948114.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 79740545 is about 8929.7561556853. The cubic root of 79740545 is about 430.4206178108.

The spelling of 79740545 in words is "seventy-nine million, seven hundred forty thousand, five hundred forty-five".