78245497 has 8 divisors (see below), whose sum is σ = 86065632. Its totient is φ = 71131060.

The previous prime is 78245483. The next prime is 78245513. The reversal of 78245497 is 79454287.

It is not a de Polignac number, because 78245497 - 2⁷ = 78245369 is a prime.

It is a super-2 number, since 2×78245497² = 12244715601554018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78245467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28063 + ... + 30724.

It is an arithmetic number, because the mean of its divisors is an integer number (10758204).

Almost surely, 2^78245497 is an apocalyptic number.

It is an amenable number.

78245497 is a deficient number, since it is larger than the sum of its proper divisors (7820135).

78245497 is an equidigital number, since it uses as much as digits as its factorization.

78245497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58820 (or 58798 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 78245497 is about 8845.6484782067. The cubic root of 78245497 is about 427.7136572071.

It can be divided in two parts, 78 and 245497, that multiplied together give a triangular number (19148766 = T₆₁₈₈).

The spelling of 78245497 in words is "seventy-eight million, two hundred forty-five thousand, four hundred ninety-seven".