401461691 has 2 divisors, whose sum is σ = 401461692. Its totient is φ = 401461690.

The previous prime is 401461673. The next prime is 401461693. The reversal of 401461691 is 196164104.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401461691 - 2¹⁰ = 401460667 is a prime.

It is a super-2 number, since 2×401461691² = 322342978681158962, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 401461693, 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 (401461693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200730845 + 200730846.

It is an arithmetic number, because the mean of its divisors is an integer number (200730846).

Almost surely, 2^401461691 is an apocalyptic number.

401461691 is a deficient number, since it is larger than the sum of its proper divisors (1).

401461691 is an equidigital number, since it uses as much as digits as its factorization.

401461691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 401461691 is about 20036.5089524098. The cubic root of 401461691 is about 737.7026946836.

The spelling of 401461691 in words is "four hundred one million, four hundred sixty-one thousand, six hundred ninety-one".