78925247 has 2 divisors, whose sum is σ = 78925248. Its totient is φ = 78925246.

The previous prime is 78925243. The next prime is 78925261. The reversal of 78925247 is 74252987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78925247 - 2² = 78925243 is a prime.

It is a super-2 number, since 2×78925247² = 12458389228022018, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78925198 and 78925207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78925241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39462623 + 39462624.

It is an arithmetic number, because the mean of its divisors is an integer number (39462624).

Almost surely, 2^78925247 is an apocalyptic number.

78925247 is a deficient number, since it is larger than the sum of its proper divisors (1).

78925247 is an equidigital number, since it uses as much as digits as its factorization.

78925247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 78925247 is about 8883.9882372727. The cubic root of 78925247 is about 428.9486610918.

The spelling of 78925247 in words is "seventy-eight million, nine hundred twenty-five thousand, two hundred forty-seven".