142981983 has 8 divisors (see below), whose sum is σ = 211825200. Its totient is φ = 95321304.

The previous prime is 142981967. The next prime is 142981991. The reversal of 142981983 is 389189241.

It is not a de Polignac number, because 142981983 - 2⁴ = 142981967 is a prime.

It is a super-2 number, since 2×142981983² = 40887694925224578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142981913) 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, 2647788 + ... + 2647841.

It is an arithmetic number, because the mean of its divisors is an integer number (26478150).

Almost surely, 2^142981983 is an apocalyptic number.

142981983 is a deficient number, since it is larger than the sum of its proper divisors (68843217).

142981983 is an equidigital number, since it uses as much as digits as its factorization.

142981983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5295638 (or 5295632 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 142981983 is about 11957.5073907567. The cubic root of 142981983 is about 522.9101903217.

The spelling of 142981983 in words is "one hundred forty-two million, nine hundred eighty-one thousand, nine hundred eighty-three".