83897431 has 8 divisors (see below), whose sum is σ = 89035200. Its totient is φ = 78782208.

The previous prime is 83897423. The next prime is 83897441. The reversal of 83897431 is 13479838.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83897431 - 2³ = 83897423 is a prime.

It is a super-2 number, since 2×83897431² = 14077557856799522, 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 (83897441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2370 + ... + 13168.

It is an arithmetic number, because the mean of its divisors is an integer number (11129400).

Almost surely, 2^83897431 is an apocalyptic number.

83897431 is a deficient number, since it is larger than the sum of its proper divisors (5137769).

83897431 is a wasteful number, since it uses less digits than its factorization.

83897431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11273.

The product of its digits is 145152, while the sum is 43.

The square root of 83897431 is about 9159.5540830326. The cubic root of 83897431 is about 437.7735862676.

The spelling of 83897431 in words is "eighty-three million, eight hundred ninety-seven thousand, four hundred thirty-one".