2154366469 has 2 divisors, whose sum is σ = 2154366470. Its totient is φ = 2154366468.

The previous prime is 2154366451. The next prime is 2154366479. The reversal of 2154366469 is 9646634512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2119497444 + 34869025 = 46038^2 + 5905^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154366469 - 2¹⁷ = 2154235397 is a prime.

It is a super-2 number, since 2×2154366469² = 9282589765503055922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154366479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077183234 + 1077183235.

It is an arithmetic number, because the mean of its divisors is an integer number (1077183235).

Almost surely, 2^2154366469 is an apocalyptic number.

It is an amenable number.

2154366469 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154366469 is an equidigital number, since it uses as much as digits as its factorization.

2154366469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 46.

The square root of 2154366469 is about 46415.1534415217. The cubic root of 2154366469 is about 1291.5360323929.

The spelling of 2154366469 in words is "two billion, one hundred fifty-four million, three hundred sixty-six thousand, four hundred sixty-nine".