83947131 has 16 divisors (see below), whose sum is σ = 127401120. Its totient is φ = 54599040.

The previous prime is 83947121. The next prime is 83947133. The reversal of 83947131 is 13174938.

It is a happy number.

It is not a de Polignac number, because 83947131 - 2⁶ = 83947067 is a prime.

It is a super-2 number, since 2×83947131² = 14094241606262322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83947133) 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, 36810 + ... + 39023.

It is an arithmetic number, because the mean of its divisors is an integer number (7962570).

Almost surely, 2^83947131 is an apocalyptic number.

83947131 is a deficient number, since it is larger than the sum of its proper divisors (43453989).

83947131 is a wasteful number, since it uses less digits than its factorization.

83947131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75883 (or 75877 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 83947131 is about 9162.2666955290. The cubic root of 83947131 is about 437.8600134368.

The spelling of 83947131 in words is "eighty-three million, nine hundred forty-seven thousand, one hundred thirty-one".