1478990687 has 8 divisors (see below), whose sum is σ = 1531110912. Its totient is φ = 1427146200.

The previous prime is 1478990657. The next prime is 1478990717. The reversal of 1478990687 is 7860998741.

It is an interprime number because it is at equal distance from previous prime (1478990657) and next prime (1478990717).

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 1478990687 - 2⁸ = 1478990431 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 (1478990627) 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, 57989 + ... + 79502.

It is an arithmetic number, because the mean of its divisors is an integer number (191388864).

Almost surely, 2^1478990687 is an apocalyptic number.

1478990687 is a deficient number, since it is larger than the sum of its proper divisors (52120225).

1478990687 is a wasteful number, since it uses less digits than its factorization.

1478990687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137869.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The square root of 1478990687 is about 38457.6479650017. The cubic root of 1478990687 is about 1139.3447262720.

The spelling of 1478990687 in words is "one billion, four hundred seventy-eight million, nine hundred ninety thousand, six hundred eighty-seven".