469138993 has 2 divisors, whose sum is σ = 469138994. Its totient is φ = 469138992.

The previous prime is 469138973. The next prime is 469139009. The reversal of 469138993 is 399831964.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 457660449 + 11478544 = 21393^2 + 3388^2 .

It is a cyclic number.

It is not a de Polignac number, because 469138993 - 2¹⁷ = 469007921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 469138993.

It is not a weakly prime, because it can be changed into another prime (469138963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 234569496 + 234569497.

It is an arithmetic number, because the mean of its divisors is an integer number (234569497).

Almost surely, 2^469138993 is an apocalyptic number.

It is an amenable number.

469138993 is a deficient number, since it is larger than the sum of its proper divisors (1).

469138993 is an equidigital number, since it uses as much as digits as its factorization.

469138993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 52.

The square root of 469138993 is about 21659.6166401901. The cubic root of 469138993 is about 777.0229456002.

The spelling of 469138993 in words is "four hundred sixty-nine million, one hundred thirty-eight thousand, nine hundred ninety-three".