401542919 has 2 divisors, whose sum is σ = 401542920. Its totient is φ = 401542918.

The previous prime is 401542909. The next prime is 401542963. The reversal of 401542919 is 919245104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401542919 - 2⁸ = 401542663 is a prime.

It is a super-2 number, since 2×401542919² = 322473431598081122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401542909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200771459 + 200771460.

It is an arithmetic number, because the mean of its divisors is an integer number (200771460).

Almost surely, 2^401542919 is an apocalyptic number.

401542919 is a deficient number, since it is larger than the sum of its proper divisors (1).

401542919 is an equidigital number, since it uses as much as digits as its factorization.

401542919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 401542919 is about 20038.5358497072. The cubic root of 401542919 is about 737.7524446141.

The spelling of 401542919 in words is "four hundred one million, five hundred forty-two thousand, nine hundred nineteen".