83774421 has 6 divisors (see below), whose sum is σ = 121007510. Its totient is φ = 55849608.

The previous prime is 83774413. The next prime is 83774429. The reversal of 83774421 is 12447738.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (83774413) and next prime (83774429).

It can be written as a sum of positive squares in only one way, i.e., 55800900 + 27973521 = 7470^2 + 5289^2 .

It is not a de Polignac number, because 83774421 - 2³ = 83774413 is a prime.

It is a super-2 number, since 2×83774421² = 14036307227770482, 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 (83774429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4654126 + ... + 4654143.

Almost surely, 2^83774421 is an apocalyptic number.

It is an amenable number.

83774421 is a deficient number, since it is larger than the sum of its proper divisors (37233089).

83774421 is a wasteful number, since it uses less digits than its factorization.

83774421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9308275 (or 9308272 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 83774421 is about 9152.8367733725. The cubic root of 83774421 is about 437.5595277912.

The spelling of 83774421 in words is "eighty-three million, seven hundred seventy-four thousand, four hundred twenty-one".