994991497 has 2 divisors, whose sum is σ = 994991498. Its totient is φ = 994991496.

The previous prime is 994991471. The next prime is 994991507. The reversal of 994991497 is 794199499.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994834681 + 156816 = 31541^2 + 396^2 .

It is a cyclic number.

It is not a de Polignac number, because 994991497 - 2²⁷ = 860773769 is a prime.

It is not a weakly prime, because it can be changed into another prime (994991597) 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, 497495748 + 497495749.

It is an arithmetic number, because the mean of its divisors is an integer number (497495749).

Almost surely, 2^994991497 is an apocalyptic number.

It is an amenable number.

994991497 is a deficient number, since it is larger than the sum of its proper divisors (1).

994991497 is an equidigital number, since it uses as much as digits as its factorization.

994991497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6613488, while the sum is 61.

The square root of 994991497 is about 31543.4858092761. The cubic root of 994991497 is about 998.3277039849.

It can be divided in two parts, 99 and 4991497, that multiplied together give a triangular number (494158203 = T₃₁₄₃₇).

The spelling of 994991497 in words is "nine hundred ninety-four million, nine hundred ninety-one thousand, four hundred ninety-seven".