78742607 has 2 divisors, whose sum is σ = 78742608. Its totient is φ = 78742606.

The previous prime is 78742597. The next prime is 78742619. The reversal of 78742607 is 70624787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78742607 - 2¹² = 78738511 is a prime.

It is a super-5 number, since 5×78742607⁵ (a number of 41 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78742687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39371303 + 39371304.

It is an arithmetic number, because the mean of its divisors is an integer number (39371304).

Almost surely, 2^78742607 is an apocalyptic number.

78742607 is a deficient number, since it is larger than the sum of its proper divisors (1).

78742607 is an equidigital number, since it uses as much as digits as its factorization.

78742607 is an evil number, because the sum of its binary digits is even.

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

The square root of 78742607 is about 8873.7031165123. The cubic root of 78742607 is about 428.6175304956.

The spelling of 78742607 in words is "seventy-eight million, seven hundred forty-two thousand, six hundred seven".