1986597473 has 16 divisors (see below), whose sum is σ = 2282822784. Its totient is φ = 1693507200.

The previous prime is 1986597467. The next prime is 1986597479. The reversal of 1986597473 is 3747956891.

It is an interprime number because it is at equal distance from previous prime (1986597467) and next prime (1986597479).

It is not a de Polignac number, because 1986597473 - 2¹⁰ = 1986596449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1986597479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1368398 + ... + 1369848.

It is an arithmetic number, because the mean of its divisors is an integer number (142676424).

Almost surely, 2^1986597473 is an apocalyptic number.

It is an amenable number.

1986597473 is a deficient number, since it is larger than the sum of its proper divisors (296225311).

1986597473 is a wasteful number, since it uses less digits than its factorization.

1986597473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392.

The product of its digits is 11430720, while the sum is 59.

The square root of 1986597473 is about 44571.2628607268. The cubic root of 1986597473 is about 1257.1003854939.

The spelling of 1986597473 in words is "one billion, nine hundred eighty-six million, five hundred ninety-seven thousand, four hundred seventy-three".