906204291989 has 2 divisors, whose sum is σ = 906204291990. Its totient is φ = 906204291988.

The previous prime is 906204291983. The next prime is 906204292051. The reversal of 906204291989 is 989192402609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 462359200900 + 443845091089 = 679970^2 + 666217^2 .

It is a cyclic number.

It is not a de Polignac number, because 906204291989 - 2⁴ = 906204291973 is a prime.

It is a super-2 number, since 2×906204291989² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (906204291983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453102145994 + 453102145995.

It is an arithmetic number, because the mean of its divisors is an integer number (453102145995).

Almost surely, 2^906204291989 is an apocalyptic number.

It is an amenable number.

906204291989 is a deficient number, since it is larger than the sum of its proper divisors (1).

906204291989 is an equidigital number, since it uses as much as digits as its factorization.

906204291989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 59.

The spelling of 906204291989 in words is "nine hundred six billion, two hundred four million, two hundred ninety-one thousand, nine hundred eighty-nine".