78469487 has 6 divisors (see below), whose sum is σ = 82817208. Its totient is φ = 74339172.

The previous prime is 78469477. The next prime is 78469493. The reversal of 78469487 is 78496487.

It is not a de Polignac number, because 78469487 - 2¹⁰ = 78468463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78469477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108323 + ... + 109044.

It is an arithmetic number, because the mean of its divisors is an integer number (13802868).

Almost surely, 2^78469487 is an apocalyptic number.

78469487 is a deficient number, since it is larger than the sum of its proper divisors (4347721).

78469487 is a wasteful number, since it uses less digits than its factorization.

78469487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217405 (or 217386 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 53.

The square root of 78469487 is about 8858.3004577628. The cubic root of 78469487 is about 428.1214008400.

Subtracting 78469487 from its reverse (78496487), we obtain a cube (27000 = 30³).

The spelling of 78469487 in words is "seventy-eight million, four hundred sixty-nine thousand, four hundred eighty-seven".