931420409 has 6 divisors (see below), whose sum is σ = 936865566. Its totient is φ = 926006720.

The previous prime is 931420309. The next prime is 931420421. The reversal of 931420409 is 904024139.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 560742400 + 370678009 = 23680^2 + 19253^2 .

It is not a de Polignac number, because 931420409 - 2²⁸ = 662984953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (931420309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14369 + ... + 45489.

It is an arithmetic number, because the mean of its divisors is an integer number (156144261).

Almost surely, 2^931420409 is an apocalyptic number.

It is an amenable number.

931420409 is a deficient number, since it is larger than the sum of its proper divisors (5445157).

931420409 is an equidigital number, since it uses as much as digits as its factorization.

931420409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31467 (or 31294 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 931420409 is about 30519.1810014620. The cubic root of 931420409 is about 976.5966943985.

The spelling of 931420409 in words is "nine hundred thirty-one million, four hundred twenty thousand, four hundred nine".