1987716431 has 8 divisors (see below), whose sum is σ = 2024850960. Its totient is φ = 1950696832.

The previous prime is 1987716421. The next prime is 1987716469. The reversal of 1987716431 is 1346177891.

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 1987716431 - 2¹⁴ = 1987700047 is a prime.

It is a super-2 number, since 2×1987716431² = 7902033220134755522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987716421) 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, 6581 + ... + 63393.

It is an arithmetic number, because the mean of its divisors is an integer number (253106370).

Almost surely, 2^1987716431 is an apocalyptic number.

1987716431 is a deficient number, since it is larger than the sum of its proper divisors (37134529).

1987716431 is an equidigital number, since it uses as much as digits as its factorization.

1987716431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57465.

The product of its digits is 254016, while the sum is 47.

The square root of 1987716431 is about 44583.8135538000. The cubic root of 1987716431 is about 1257.3363632626.

The spelling of 1987716431 in words is "one billion, nine hundred eighty-seven million, seven hundred sixteen thousand, four hundred thirty-one".