401914649 has 2 divisors, whose sum is σ = 401914650. Its totient is φ = 401914648.

The previous prime is 401914631. The next prime is 401914651. The reversal of 401914649 is 946419104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358420624 + 43494025 = 18932^2 + 6595^2 .

It is a cyclic number.

It is not a de Polignac number, because 401914649 - 2¹⁶ = 401849113 is a prime.

Together with 401914651, 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 (401913649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200957324 + 200957325.

It is an arithmetic number, because the mean of its divisors is an integer number (200957325).

Almost surely, 2^401914649 is an apocalyptic number.

It is an amenable number.

401914649 is a deficient number, since it is larger than the sum of its proper divisors (1).

401914649 is an equidigital number, since it uses as much as digits as its factorization.

401914649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 401914649 is about 20047.8090822913. The cubic root of 401914649 is about 737.9800335126.

The spelling of 401914649 in words is "four hundred one million, nine hundred fourteen thousand, six hundred forty-nine".