146989947 has 24 divisors (see below), whose sum is σ = 223406400. Its totient is φ = 85688928.

The previous prime is 146989943. The next prime is 146989963. The reversal of 146989947 is 749989641.

It is not a de Polignac number, because 146989947 - 2² = 146989943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (146989943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2004 + ... + 17262.

It is an arithmetic number, because the mean of its divisors is an integer number (9308600).

Almost surely, 2^146989947 is an apocalyptic number.

146989947 is a deficient number, since it is larger than the sum of its proper divisors (76416453).

146989947 is a wasteful number, since it uses less digits than its factorization.

146989947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15307 (or 15294 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 57.

The square root of 146989947 is about 12123.9410671613. The cubic root of 146989947 is about 527.7511776691.

Adding to 146989947 its product of digits (3919104), we get a palindrome (150909051).

The spelling of 146989947 in words is "one hundred forty-six million, nine hundred eighty-nine thousand, nine hundred forty-seven".