1946158489 has 4 divisors (see below), whose sum is σ = 2123082000. Its totient is φ = 1769234980.

The previous prime is 1946158481. The next prime is 1946158499. The reversal of 1946158489 is 9848516491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9848516491 = 11 ⋅895319681.

It is a cyclic number.

It is not a de Polignac number, because 1946158489 - 2³ = 1946158481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1946158481) 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, 88461739 + ... + 88461760.

It is an arithmetic number, because the mean of its divisors is an integer number (530770500).

Almost surely, 2^1946158489 is an apocalyptic number.

It is an amenable number.

1946158489 is a deficient number, since it is larger than the sum of its proper divisors (176923511).

1946158489 is a wasteful number, since it uses less digits than its factorization.

1946158489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176923510.

The product of its digits is 2488320, while the sum is 55.

The square root of 1946158489 is about 44115.2863415846. The cubic root of 1946158489 is about 1248.5120404706.

The spelling of 1946158489 in words is "one billion, nine hundred forty-six million, one hundred fifty-eight thousand, four hundred eighty-nine".