1851416969 has 2 divisors, whose sum is σ = 1851416970. Its totient is φ = 1851416968.

The previous prime is 1851416929. The next prime is 1851416971. The reversal of 1851416969 is 9696141581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1514143744 + 337273225 = 38912^2 + 18365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1851416969 - 2¹² = 1851412873 is a prime.

It is a super-2 number, since 2×1851416969² = 6855489586202293922, which contains 22 as substring.

Together with 1851416971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1851416929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925708484 + 925708485.

It is an arithmetic number, because the mean of its divisors is an integer number (925708485).

Almost surely, 2^1851416969 is an apocalyptic number.

It is an amenable number.

1851416969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1851416969 is an equidigital number, since it uses as much as digits as its factorization.

1851416969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 50.

The square root of 1851416969 is about 43028.0951123798. The cubic root of 1851416969 is about 1227.9143646936.

The spelling of 1851416969 in words is "one billion, eight hundred fifty-one million, four hundred sixteen thousand, nine hundred sixty-nine".