1994412551 has 2 divisors, whose sum is σ = 1994412552. Its totient is φ = 1994412550.

The previous prime is 1994412529. The next prime is 1994412557. The reversal of 1994412551 is 1552144991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1994412551 - 2¹⁰ = 1994411527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1994412499 and 1994412508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994412557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997206275 + 997206276.

It is an arithmetic number, because the mean of its divisors is an integer number (997206276).

Almost surely, 2^1994412551 is an apocalyptic number.

1994412551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994412551 is an equidigital number, since it uses as much as digits as its factorization.

1994412551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 41.

The square root of 1994412551 is about 44658.8462793207. The cubic root of 1994412551 is about 1258.7466648105.

The spelling of 1994412551 in words is "one billion, nine hundred ninety-four million, four hundred twelve thousand, five hundred fifty-one".