997150889429 has 2 divisors, whose sum is σ = 997150889430. Its totient is φ = 997150889428.

The previous prime is 997150889401. The next prime is 997150889533. The reversal of 997150889429 is 924988051799.

997150889429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 870112108804 + 127038780625 = 932798^2 + 356425^2 .

It is a cyclic number.

It is not a de Polignac number, because 997150889429 - 2¹² = 997150885333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997150889029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498575444714 + 498575444715.

It is an arithmetic number, because the mean of its divisors is an integer number (498575444715).

Almost surely, 2^997150889429 is an apocalyptic number.

It is an amenable number.

997150889429 is a deficient number, since it is larger than the sum of its proper divisors (1).

997150889429 is an equidigital number, since it uses as much as digits as its factorization.

997150889429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117573120, while the sum is 71.

The spelling of 997150889429 in words is "nine hundred ninety-seven billion, one hundred fifty million, eight hundred eighty-nine thousand, four hundred twenty-nine".