83951649 has 6 divisors (see below), whose sum is σ = 121263506. Its totient is φ = 55967760.

The previous prime is 83951611. The next prime is 83951669. The reversal of 83951649 is 94615938.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 79923600 + 4028049 = 8940^2 + 2007^2 .

It is not a de Polignac number, because 83951649 - 2⁹ = 83951137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83951669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4663972 + ... + 4663989.

Almost surely, 2^83951649 is an apocalyptic number.

It is an amenable number.

83951649 is a deficient number, since it is larger than the sum of its proper divisors (37311857).

83951649 is a wasteful number, since it uses less digits than its factorization.

83951649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9327967 (or 9327964 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 83951649 is about 9162.5132469208. The cubic root of 83951649 is about 437.8678684443.

The spelling of 83951649 in words is "eighty-three million, nine hundred fifty-one thousand, six hundred forty-nine".