83739431 has 4 divisors (see below), whose sum is σ = 84051000. Its totient is φ = 83427864.

The previous prime is 83739413. The next prime is 83739437. The reversal of 83739431 is 13493738.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83739431 - 2¹⁴ = 83723047 is a prime.

It is a super-2 number, since 2×83739431² = 14024584608407522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83739437) 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, 155381 + ... + 155918.

It is an arithmetic number, because the mean of its divisors is an integer number (21012750).

Almost surely, 2^83739431 is an apocalyptic number.

83739431 is a deficient number, since it is larger than the sum of its proper divisors (311569).

83739431 is a wasteful number, since it uses less digits than its factorization.

83739431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311568.

The product of its digits is 54432, while the sum is 38.

The square root of 83739431 is about 9150.9251444868. The cubic root of 83739431 is about 437.4986009207.

The spelling of 83739431 in words is "eighty-three million, seven hundred thirty-nine thousand, four hundred thirty-one".