78497497 has 8 divisors (see below), whose sum is σ = 84623616. Its totient is φ = 72383952.

The previous prime is 78497479. The next prime is 78497509. The reversal of 78497497 is 79479487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78497497 - 2⁷ = 78497369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78497437) 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, 12888 + ... + 17974.

It is an arithmetic number, because the mean of its divisors is an integer number (10577952).

Almost surely, 2^78497497 is an apocalyptic number.

It is an amenable number.

78497497 is a deficient number, since it is larger than the sum of its proper divisors (6126119).

78497497 is a wasteful number, since it uses less digits than its factorization.

78497497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6287.

The product of its digits is 3556224, while the sum is 55.

The square root of 78497497 is about 8859.8813197469. The cubic root of 78497497 is about 428.1723346673.

The spelling of 78497497 in words is "seventy-eight million, four hundred ninety-seven thousand, four hundred ninety-seven".