78902132213 has 2 divisors, whose sum is σ = 78902132214. Its totient is φ = 78902132212.

The previous prime is 78902132207. The next prime is 78902132251. The reversal of 78902132213 is 31223120987.

It is a happy number.

It is an a-pointer prime, because the next prime (78902132251) can be obtained adding 78902132213 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67146802129 + 11755330084 = 259127^2 + 108422^2 .

It is an emirp because it is prime and its reverse (31223120987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78902132213 - 2²⁴ = 78885354997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78902131213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39451066106 + 39451066107.

It is an arithmetic number, because the mean of its divisors is an integer number (39451066107).

Almost surely, 2^78902132213 is an apocalyptic number.

It is an amenable number.

78902132213 is a deficient number, since it is larger than the sum of its proper divisors (1).

78902132213 is an equidigital number, since it uses as much as digits as its factorization.

78902132213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 78902132213 in words is "seventy-eight billion, nine hundred two million, one hundred thirty-two thousand, two hundred thirteen".