400130249 has 2 divisors, whose sum is σ = 400130250. Its totient is φ = 400130248.

The previous prime is 400130221. The next prime is 400130251. The reversal of 400130249 is 942031004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396288649 + 3841600 = 19907^2 + 1960^2 .

It is a cyclic number.

It is not a de Polignac number, because 400130249 - 2⁸ = 400129993 is a prime.

Together with 400130251, 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 (400130209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200065124 + 200065125.

It is an arithmetic number, because the mean of its divisors is an integer number (200065125).

Almost surely, 2^400130249 is an apocalyptic number.

It is an amenable number.

400130249 is a deficient number, since it is larger than the sum of its proper divisors (1).

400130249 is an equidigital number, since it uses as much as digits as its factorization.

400130249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 400130249 is about 20003.2559599681. The cubic root of 400130249 is about 736.8862646190.

The spelling of 400130249 in words is "four hundred million, one hundred thirty thousand, two hundred forty-nine".