78437361 has 4 divisors (see below), whose sum is σ = 104583152. Its totient is φ = 52291572.

The previous prime is 78437341. The next prime is 78437389. The reversal of 78437361 is 16373487.

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 not a de Polignac number, because 78437361 - 2⁵ = 78437329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78437341) 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, 13072891 + ... + 13072896.

It is an arithmetic number, because the mean of its divisors is an integer number (26145788).

Almost surely, 2^78437361 is an apocalyptic number.

It is an amenable number.

78437361 is a deficient number, since it is larger than the sum of its proper divisors (26145791).

78437361 is a wasteful number, since it uses less digits than its factorization.

78437361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26145790.

The product of its digits is 84672, while the sum is 39.

The square root of 78437361 is about 8856.4869446073. The cubic root of 78437361 is about 428.0629674877.

The spelling of 78437361 in words is "seventy-eight million, four hundred thirty-seven thousand, three hundred sixty-one".