78437001 has 4 divisors (see below), whose sum is σ = 104582672. Its totient is φ = 52291332.

The previous prime is 78436987. The next prime is 78437011. The reversal of 78437001 is 10073487.

It is a happy number.

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: 10073487 = 3 ⋅3357829.

It is not a de Polignac number, because 78437001 - 2⁹ = 78436489 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 78437001.

It is not an unprimeable number, because it can be changed into a prime (78437011) 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, 13072831 + ... + 13072836.

It is an arithmetic number, because the mean of its divisors is an integer number (26145668).

Almost surely, 2^78437001 is an apocalyptic number.

It is an amenable number.

78437001 is a deficient number, since it is larger than the sum of its proper divisors (26145671).

78437001 is a wasteful number, since it uses less digits than its factorization.

78437001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26145670.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 78437001 is about 8856.4666204983. The cubic root of 78437001 is about 428.0623126004.

The spelling of 78437001 in words is "seventy-eight million, four hundred thirty-seven thousand, one".