78461837 has 4 divisors (see below), whose sum is σ = 80992896. Its totient is φ = 75930780.

The previous prime is 78461821. The next prime is 78461857. The reversal of 78461837 is 73816487.

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 78461837 - 2⁴ = 78461821 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 (78461807) 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, 1265483 + ... + 1265544.

It is an arithmetic number, because the mean of its divisors is an integer number (20248224).

Almost surely, 2^78461837 is an apocalyptic number.

It is an amenable number.

78461837 is a deficient number, since it is larger than the sum of its proper divisors (2531059).

78461837 is a wasteful number, since it uses less digits than its factorization.

78461837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531058.

The product of its digits is 225792, while the sum is 44.

The square root of 78461837 is about 8857.8686488342. The cubic root of 78461837 is about 428.1074878517.

The spelling of 78461837 in words is "seventy-eight million, four hundred sixty-one thousand, eight hundred thirty-seven".