400000042319 has 2 divisors, whose sum is σ = 400000042320. Its totient is φ = 400000042318.

The previous prime is 400000042291. The next prime is 400000042399. The reversal of 400000042319 is 913240000004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400000042319 - 2²⁰ = 399998993743 is a prime.

It is a super-2 number, since 2×400000042319² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400000042294 and 400000042303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400000042399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200000021159 + 200000021160.

It is an arithmetic number, because the mean of its divisors is an integer number (200000021160).

Almost surely, 2^400000042319 is an apocalyptic number.

400000042319 is a deficient number, since it is larger than the sum of its proper divisors (1).

400000042319 is an equidigital number, since it uses as much as digits as its factorization.

400000042319 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 spelling of 400000042319 in words is "four hundred billion, forty-two thousand, three hundred nineteen".