401587829 has 2 divisors, whose sum is σ = 401587830. Its totient is φ = 401587828.

The previous prime is 401587789. The next prime is 401587831. The reversal of 401587829 is 928785104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376437604 + 25150225 = 19402^2 + 5015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401587829 is a prime.

It is a super-2 number, since 2×401587829² = 322545568801866482, which contains 22 as substring.

Together with 401587831, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401587829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401587859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200793914 + 200793915.

It is an arithmetic number, because the mean of its divisors is an integer number (200793915).

Almost surely, 2^401587829 is an apocalyptic number.

It is an amenable number.

401587829 is a deficient number, since it is larger than the sum of its proper divisors (1).

401587829 is an equidigital number, since it uses as much as digits as its factorization.

401587829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 401587829 is about 20039.6564092302. The cubic root of 401587829 is about 737.7799478817.

The spelling of 401587829 in words is "four hundred one million, five hundred eighty-seven thousand, eight hundred twenty-nine".