78699058 has 4 divisors (see below), whose sum is σ = 118048590. Its totient is φ = 39349528.

The previous prime is 78699053. The next prime is 78699059. The reversal of 78699058 is 85099687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85099687 = 2203 ⋅38629.

It can be written as a sum of positive squares in only one way, i.e., 76440049 + 2259009 = 8743^2 + 1503^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78698996 and 78699014.

It is not an unprimeable number, because it can be changed into a prime (78699053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19674763 + ... + 19674766.

Almost surely, 2^78699058 is an apocalyptic number.

78699058 is a deficient number, since it is larger than the sum of its proper divisors (39349532).

78699058 is a wasteful number, since it uses less digits than its factorization.

78699058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39349531.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 78699058 is about 8871.2489537832. The cubic root of 78699058 is about 428.5384995546.

The spelling of 78699058 in words is "seventy-eight million, six hundred ninety-nine thousand, fifty-eight".