78012901 has 4 divisors (see below), whose sum is σ = 78309792. Its totient is φ = 77716012.

The previous prime is 78012899. The next prime is 78012911. The reversal of 78012901 is 10921087.

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.

It is a cyclic number.

It is not a de Polignac number, because 78012901 - 2¹ = 78012899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78012901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78012911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148051 + ... + 148576.

It is an arithmetic number, because the mean of its divisors is an integer number (19577448).

Almost surely, 2^78012901 is an apocalyptic number.

It is an amenable number.

78012901 is a deficient number, since it is larger than the sum of its proper divisors (296891).

78012901 is a wasteful number, since it uses less digits than its factorization.

78012901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296890.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 78012901 is about 8832.4912114307. The cubic root of 78012901 is about 427.2894230975.

Adding to 78012901 its reverse (10921087), we get a palindrome (88933988).

The spelling of 78012901 in words is "seventy-eight million, twelve thousand, nine hundred one".