83378431 has 2 divisors, whose sum is σ = 83378432. Its totient is φ = 83378430.

The previous prime is 83378411. The next prime is 83378459. The reversal of 83378431 is 13487338.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83378431 - 2⁷ = 83378303 is a prime.

It is a super-2 number, since 2×83378431² = 13903925512043522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83378401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41689215 + 41689216.

It is an arithmetic number, because the mean of its divisors is an integer number (41689216).

Almost surely, 2^83378431 is an apocalyptic number.

83378431 is a deficient number, since it is larger than the sum of its proper divisors (1).

83378431 is an equidigital number, since it uses as much as digits as its factorization.

83378431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 83378431 is about 9131.1790585882. The cubic root of 83378431 is about 436.8690110401.

The spelling of 83378431 in words is "eighty-three million, three hundred seventy-eight thousand, four hundred thirty-one".