1406081987 has 4 divisors (see below), whose sum is σ = 1409017920. Its totient is φ = 1403146056.

The previous prime is 1406081969. The next prime is 1406081993. The reversal of 1406081987 is 7891806041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1406081987 - 2⁸ = 1406081731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1406081087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1467248 + ... + 1468205.

It is an arithmetic number, because the mean of its divisors is an integer number (352254480).

Almost surely, 2^1406081987 is an apocalyptic number.

1406081987 is a deficient number, since it is larger than the sum of its proper divisors (2935933).

1406081987 is an equidigital number, since it uses as much as digits as its factorization.

1406081987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2935932.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 1406081987 is about 37497.7597597510. The cubic root of 1406081987 is about 1120.3065665360.

The spelling of 1406081987 in words is "one billion, four hundred six million, eighty-one thousand, nine hundred eighty-seven".