78311941 has 4 divisors (see below), whose sum is σ = 81716832. Its totient is φ = 74907052.

The previous prime is 78311929. The next prime is 78311951. The reversal of 78311941 is 14911387.

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 78311941 - 2¹³ = 78303749 is a prime.

It is a super-2 number, since 2×78311941² = 12265520206374962, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78311897 and 78311906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78311951) 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, 1702411 + ... + 1702456.

It is an arithmetic number, because the mean of its divisors is an integer number (20429208).

Almost surely, 2^78311941 is an apocalyptic number.

It is an amenable number.

78311941 is a deficient number, since it is larger than the sum of its proper divisors (3404891).

78311941 is a wasteful number, since it uses less digits than its factorization.

78311941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404890.

The product of its digits is 6048, while the sum is 34.

The square root of 78311941 is about 8849.4034262203. The cubic root of 78311941 is about 427.8346906506.

The spelling of 78311941 in words is "seventy-eight million, three hundred eleven thousand, nine hundred forty-one".