78761197 has 6 divisors (see below), whose sum is σ = 80945358. Its totient is φ = 76579992.

The previous prime is 78761167. The next prime is 78761201. The reversal of 78761197 is 79116787.

It can be written as a sum of positive squares in only one way, i.e., 76632516 + 2128681 = 8754^2 + 1459^2 .

It is not a de Polignac number, because 78761197 - 2⁷ = 78761069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78761117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53254 + ... + 54712.

It is an arithmetic number, because the mean of its divisors is an integer number (13490893).

Almost surely, 2^78761197 is an apocalyptic number.

It is an amenable number.

78761197 is a deficient number, since it is larger than the sum of its proper divisors (2184161).

78761197 is an frugal number, since it uses more digits than its factorization.

78761197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2955 (or 1496 counting only the distinct ones).

The product of its digits is 148176, while the sum is 46.

The square root of 78761197 is about 8874.7505317051. The cubic root of 78761197 is about 428.6512579918.

The spelling of 78761197 in words is "seventy-eight million, seven hundred sixty-one thousand, one hundred ninety-seven".