994152421 has 2 divisors, whose sum is σ = 994152422. Its totient is φ = 994152420.

The previous prime is 994152403. The next prime is 994152427. The reversal of 994152421 is 124251499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 913852900 + 80299521 = 30230^2 + 8961^2 .

It is a cyclic number.

It is not a de Polignac number, because 994152421 - 2⁷ = 994152293 is a prime.

It is a super-2 number, since 2×994152421² = 1976678072360322482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994152427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497076210 + 497076211.

It is an arithmetic number, because the mean of its divisors is an integer number (497076211).

Almost surely, 2^994152421 is an apocalyptic number.

It is an amenable number.

994152421 is a deficient number, since it is larger than the sum of its proper divisors (1).

994152421 is an equidigital number, since it uses as much as digits as its factorization.

994152421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 37.

The square root of 994152421 is about 31530.1826984875. The cubic root of 994152421 is about 998.0469952555.

The spelling of 994152421 in words is "nine hundred ninety-four million, one hundred fifty-two thousand, four hundred twenty-one".