60878809 has 4 divisors (see below), whose sum is σ = 62363700. Its totient is φ = 59393920.

The previous prime is 60878749. The next prime is 60878837. The reversal of 60878809 is 90887806.

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 2310400 + 58568409 = 1520^2 + 7653^2 .

It is a cyclic number.

It is not a de Polignac number, because 60878809 - 2⁹ = 60878297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60878509) 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, 742384 + ... + 742465.

It is an arithmetic number, because the mean of its divisors is an integer number (15590925).

Almost surely, 2^60878809 is an apocalyptic number.

It is an amenable number.

60878809 is a deficient number, since it is larger than the sum of its proper divisors (1484891).

60878809 is a wasteful number, since it uses less digits than its factorization.

60878809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484890.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 60878809 is about 7802.4873598103. The cubic root of 60878809 is about 393.3888525640.

The spelling of 60878809 in words is "sixty million, eight hundred seventy-eight thousand, eight hundred nine".