71487663 has 32 divisors (see below), whose sum is σ = 106638336. Its totient is φ = 42311808.

The previous prime is 71487649. The next prime is 71487679. The reversal of 71487663 is 36678417.

It is not a de Polignac number, because 71487663 - 2⁵ = 71487631 is a prime.

It is a super-2 number, since 2×71487663² = 10220971922403138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71487613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154170 + ... + 154632.

It is an arithmetic number, because the mean of its divisors is an integer number (3332448).

Almost surely, 2^71487663 is an apocalyptic number.

71487663 is a deficient number, since it is larger than the sum of its proper divisors (35150673).

71487663 is a wasteful number, since it uses less digits than its factorization.

71487663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623.

The product of its digits is 169344, while the sum is 42.

The square root of 71487663 is about 8455.0377290702. The cubic root of 71487663 is about 415.0276519050.

The spelling of 71487663 in words is "seventy-one million, four hundred eighty-seven thousand, six hundred sixty-three".