78747341 has 2 divisors, whose sum is σ = 78747342. Its totient is φ = 78747340.

The previous prime is 78747299. The next prime is 78747353. The reversal of 78747341 is 14374787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78393316 + 354025 = 8854^2 + 595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78747341 is a prime.

It is a super-2 number, since 2×78747341² = 12402287429140562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78747391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39373670 + 39373671.

It is an arithmetic number, because the mean of its divisors is an integer number (39373671).

Almost surely, 2^78747341 is an apocalyptic number.

It is an amenable number.

78747341 is a deficient number, since it is larger than the sum of its proper divisors (1).

78747341 is an equidigital number, since it uses as much as digits as its factorization.

78747341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131712, while the sum is 41.

The square root of 78747341 is about 8873.9698557072. The cubic root of 78747341 is about 428.6261198088.

The spelling of 78747341 in words is "seventy-eight million, seven hundred forty-seven thousand, three hundred forty-one".