31405001293 has 2 divisors, whose sum is σ = 31405001294. Its totient is φ = 31405001292.

The previous prime is 31405001209. The next prime is 31405001347. The reversal of 31405001293 is 39210050413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17869540329 + 13535460964 = 133677^2 + 116342^2 .

It is a cyclic number.

It is not a de Polignac number, because 31405001293 - 2¹³ = 31404993101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31405001993) 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, 15702500646 + 15702500647.

It is an arithmetic number, because the mean of its divisors is an integer number (15702500647).

Almost surely, 2^31405001293 is an apocalyptic number.

It is an amenable number.

31405001293 is a deficient number, since it is larger than the sum of its proper divisors (1).

31405001293 is an equidigital number, since it uses as much as digits as its factorization.

31405001293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 31405001293 in words is "thirty-one billion, four hundred five million, one thousand, two hundred ninety-three".