78932237 has 2 divisors, whose sum is σ = 78932238. Its totient is φ = 78932236.

The previous prime is 78932233. The next prime is 78932263. The reversal of 78932237 is 73223987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71808676 + 7123561 = 8474^2 + 2669^2 .

It is an emirp because it is prime and its reverse (73223987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78932237 - 2² = 78932233 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78932194 and 78932203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78932233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39466118 + 39466119.

It is an arithmetic number, because the mean of its divisors is an integer number (39466119).

Almost surely, 2^78932237 is an apocalyptic number.

It is an amenable number.

78932237 is a deficient number, since it is larger than the sum of its proper divisors (1).

78932237 is an equidigital number, since it uses as much as digits as its factorization.

78932237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 78932237 is about 8884.3816329557. The cubic root of 78932237 is about 428.9613239711.

The spelling of 78932237 in words is "seventy-eight million, nine hundred thirty-two thousand, two hundred thirty-seven".