400734037399 has 2 divisors, whose sum is σ = 400734037400. Its totient is φ = 400734037398.

The previous prime is 400734037397. The next prime is 400734037421. The reversal of 400734037399 is 993730437004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400734037399 - 2¹ = 400734037397 is a prime.

It is a super-3 number, since 3×400734037399³ (a number of 36 digits) contains 333 as substring.

Together with 400734037397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400734037397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200367018699 + 200367018700.

It is an arithmetic number, because the mean of its divisors is an integer number (200367018700).

Almost surely, 2^400734037399 is an apocalyptic number.

400734037399 is a deficient number, since it is larger than the sum of its proper divisors (1).

400734037399 is an equidigital number, since it uses as much as digits as its factorization.

400734037399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1714608, while the sum is 49.

The spelling of 400734037399 in words is "four hundred billion, seven hundred thirty-four million, thirty-seven thousand, three hundred ninety-nine".