83490731 has 4 divisors (see below), whose sum is σ = 87885000. Its totient is φ = 79096464.

The previous prime is 83490721. The next prime is 83490773. The reversal of 83490731 is 13709438.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83490731 is a prime.

It is a super-2 number, since 2×83490731² = 13941404325828722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83490691 and 83490700.

It is not an unprimeable number, because it can be changed into a prime (83490721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2197106 + ... + 2197143.

It is an arithmetic number, because the mean of its divisors is an integer number (21971250).

Almost surely, 2^83490731 is an apocalyptic number.

83490731 is a deficient number, since it is larger than the sum of its proper divisors (4394269).

83490731 is a wasteful number, since it uses less digits than its factorization.

83490731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4394268.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 83490731 is about 9137.3262500581. The cubic root of 83490731 is about 437.0650584663.

The spelling of 83490731 in words is "eighty-three million, four hundred ninety thousand, seven hundred thirty-one".