400119997 has 2 divisors, whose sum is σ = 400119998. Its totient is φ = 400119996.

The previous prime is 400119991. The next prime is 400120001. The reversal of 400119997 is 799911004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397842916 + 2277081 = 19946^2 + 1509^2 .

It is a cyclic number.

It is not a de Polignac number, because 400119997 - 2⁷ = 400119869 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400119991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200059998 + 200059999.

It is an arithmetic number, because the mean of its divisors is an integer number (200059999).

Almost surely, 2^400119997 is an apocalyptic number.

It is an amenable number.

400119997 is a deficient number, since it is larger than the sum of its proper divisors (1).

400119997 is an equidigital number, since it uses as much as digits as its factorization.

400119997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 400119997 is about 20002.9997000450. Note that the first 3 decimals coincide. The cubic root of 400119997 is about 736.8799711496.

The spelling of 400119997 in words is "four hundred million, one hundred nineteen thousand, nine hundred ninety-seven".