78393497 has 16 divisors (see below), whose sum is σ = 96781440. Its totient is φ = 61834752.

The previous prime is 78393461. The next prime is 78393521. The reversal of 78393497 is 79439387.

It is not a de Polignac number, because 78393497 - 2¹² = 78389401 is a prime.

It is a super-2 number, since 2×78393497² = 12291080743778018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78393437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33353 + ... + 35625.

It is an arithmetic number, because the mean of its divisors is an integer number (6048840).

Almost surely, 2^78393497 is an apocalyptic number.

It is an amenable number.

78393497 is a deficient number, since it is larger than the sum of its proper divisors (18387943).

78393497 is a wasteful number, since it uses less digits than its factorization.

78393497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2672.

The product of its digits is 1143072, while the sum is 50.

The square root of 78393497 is about 8854.0102213630. The cubic root of 78393497 is about 427.9831583468.

The spelling of 78393497 in words is "seventy-eight million, three hundred ninety-three thousand, four hundred ninety-seven".