31469382409 has 2 divisors, whose sum is σ = 31469382410. Its totient is φ = 31469382408.

The previous prime is 31469382407. The next prime is 31469382419. The reversal of 31469382409 is 90428396413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18342639225 + 13126743184 = 135435^2 + 114572^2 .

It is an emirp because it is prime and its reverse (90428396413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31469382409 - 2¹ = 31469382407 is a prime.

Together with 31469382407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31469382403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15734691204 + 15734691205.

It is an arithmetic number, because the mean of its divisors is an integer number (15734691205).

Almost surely, 2^31469382409 is an apocalyptic number.

It is an amenable number.

31469382409 is a deficient number, since it is larger than the sum of its proper divisors (1).

31469382409 is an equidigital number, since it uses as much as digits as its factorization.

31469382409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 31469382409 in words is "thirty-one billion, four hundred sixty-nine million, three hundred eighty-two thousand, four hundred nine".