31423673 has 2 divisors, whose sum is σ = 31423674. Its totient is φ = 31423672.

The previous prime is 31423661. The next prime is 31423687. The reversal of 31423673 is 37632413.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21132409 + 10291264 = 4597^2 + 3208^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423673 - 2⁴ = 31423657 is a prime.

It is equal to p_1940465 and since 31423673 and 1940465 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (31423643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711836 + 15711837.

It is an arithmetic number, because the mean of its divisors is an integer number (15711837).

Almost surely, 2^31423673 is an apocalyptic number.

It is an amenable number.

31423673 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423673 is an equidigital number, since it uses as much as digits as its factorization.

31423673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 29.

The square root of 31423673 is about 5605.6822064759. The cubic root of 31423673 is about 315.5626895654.

The spelling of 31423673 in words is "thirty-one million, four hundred twenty-three thousand, six hundred seventy-three".