391462429 has 2 divisors, whose sum is σ = 391462430. Its totient is φ = 391462428.

The previous prime is 391462391. The next prime is 391462433. The reversal of 391462429 is 924264193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331167204 + 60295225 = 18198^2 + 7765^2 .

It is an emirp because it is prime and its reverse (924264193) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391462429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 391462391 and 391462400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391462499) 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, 195731214 + 195731215.

It is an arithmetic number, because the mean of its divisors is an integer number (195731215).

Almost surely, 2^391462429 is an apocalyptic number.

It is an amenable number.

391462429 is a deficient number, since it is larger than the sum of its proper divisors (1).

391462429 is an equidigital number, since it uses as much as digits as its factorization.

391462429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 40.

The square root of 391462429 is about 19785.4094979103. The cubic root of 391462429 is about 731.5264419145.

The spelling of 391462429 in words is "three hundred ninety-one million, four hundred sixty-two thousand, four hundred twenty-nine".