78804901 has 4 divisors (see below), whose sum is σ = 90062752. Its totient is φ = 67547052.

The previous prime is 78804899. The next prime is 78804953. The reversal of 78804901 is 10940887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10940887 = 71 ⋅154097.

It is a cyclic number.

It is not a de Polignac number, because 78804901 - 2¹ = 78804899 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 (78804301) 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, 5628915 + ... + 5628928.

It is an arithmetic number, because the mean of its divisors is an integer number (22515688).

Almost surely, 2^78804901 is an apocalyptic number.

It is an amenable number.

78804901 is a deficient number, since it is larger than the sum of its proper divisors (11257851).

78804901 is a wasteful number, since it uses less digits than its factorization.

78804901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11257850.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 78804901 is about 8877.2124566217. The cubic root of 78804901 is about 428.7305284587.

The spelling of 78804901 in words is "seventy-eight million, eight hundred four thousand, nine hundred one".