78227371 has 2 divisors, whose sum is σ = 78227372. Its totient is φ = 78227370.

The previous prime is 78227341. The next prime is 78227377. The reversal of 78227371 is 17372287.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78227371 - 2⁹ = 78226859 is a prime.

It is a super-2 number, since 2×78227371² = 12239043147143282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78227371.

It is not a weakly prime, because it can be changed into another prime (78227377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39113685 + 39113686.

It is an arithmetic number, because the mean of its divisors is an integer number (39113686).

Almost surely, 2^78227371 is an apocalyptic number.

78227371 is a deficient number, since it is larger than the sum of its proper divisors (1).

78227371 is an equidigital number, since it uses as much as digits as its factorization.

78227371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 37.

The square root of 78227371 is about 8844.6238472871. The cubic root of 78227371 is about 427.6806272490.

The spelling of 78227371 in words is "seventy-eight million, two hundred twenty-seven thousand, three hundred seventy-one".