400034211212989 has 2 divisors, whose sum is σ = 400034211212990. Its totient is φ = 400034211212988.

The previous prime is 400034211212981. The next prime is 400034211213139. The reversal of 400034211212989 is 989212112430004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398854141796889 + 1180069416100 = 19971333^2 + 1086310^2 .

It is a cyclic number.

It is not a de Polignac number, because 400034211212989 - 2³ = 400034211212981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400034211212981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200017105606494 + 200017105606495.

It is an arithmetic number, because the mean of its divisors is an integer number (200017105606495).

Almost surely, 2^{400034211212989} is an apocalyptic number.

It is an amenable number.

400034211212989 is a deficient number, since it is larger than the sum of its proper divisors (1).

400034211212989 is an equidigital number, since it uses as much as digits as its factorization.

400034211212989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 400034211212989 in words is "four hundred trillion, thirty-four billion, two hundred eleven million, two hundred twelve thousand, nine hundred eighty-nine".