1986923149 has 8 divisors (see below), whose sum is σ = 2084170752. Its totient is φ = 1890580560.

The previous prime is 1986923027. The next prime is 1986923189. The reversal of 1986923149 is 9413296891.

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 1986923149 - 2¹³ = 1986914957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1986923096 and 1986923105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986923189) 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, 221754 + ... + 230539.

It is an arithmetic number, because the mean of its divisors is an integer number (260521344).

Almost surely, 2^1986923149 is an apocalyptic number.

It is an amenable number.

1986923149 is a deficient number, since it is larger than the sum of its proper divisors (97247603).

1986923149 is a wasteful number, since it uses less digits than its factorization.

1986923149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452507.

The product of its digits is 839808, while the sum is 52.

The square root of 1986923149 is about 44574.9161412559. The cubic root of 1986923149 is about 1257.1690766539.

The spelling of 1986923149 in words is "one billion, nine hundred eighty-six million, nine hundred twenty-three thousand, one hundred forty-nine".