285400803971 has 2 divisors, whose sum is σ = 285400803972. Its totient is φ = 285400803970.

The previous prime is 285400803929. The next prime is 285400803973. The reversal of 285400803971 is 179308004582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285400803971 - 2⁶ = 285400803907 is a prime.

Together with 285400803973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (285400803973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142700401985 + 142700401986.

It is an arithmetic number, because the mean of its divisors is an integer number (142700401986).

Almost surely, 2^285400803971 is an apocalyptic number.

285400803971 is a deficient number, since it is larger than the sum of its proper divisors (1).

285400803971 is an equidigital number, since it uses as much as digits as its factorization.

285400803971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 285400803971 in words is "two hundred eighty-five billion, four hundred million, eight hundred three thousand, nine hundred seventy-one".