78212941 has 2 divisors, whose sum is σ = 78212942. Its totient is φ = 78212940.

The previous prime is 78212929. The next prime is 78212951. The reversal of 78212941 is 14921287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58446025 + 19766916 = 7645^2 + 4446^2 .

It is a cyclic number.

It is not a de Polignac number, because 78212941 - 2⁵ = 78212909 is a prime.

It is a super-2 number, since 2×78212941² = 12234528279738962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78212897 and 78212906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78212921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39106470 + 39106471.

It is an arithmetic number, because the mean of its divisors is an integer number (39106471).

Almost surely, 2^78212941 is an apocalyptic number.

It is an amenable number.

78212941 is a deficient number, since it is larger than the sum of its proper divisors (1).

78212941 is an equidigital number, since it uses as much as digits as its factorization.

78212941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 78212941 is about 8843.8080598801. The cubic root of 78212941 is about 427.6543286492.

The spelling of 78212941 in words is "seventy-eight million, two hundred twelve thousand, nine hundred forty-one".