31423877 has 2 divisors, whose sum is σ = 31423878. Its totient is φ = 31423876.

The previous prime is 31423823. The next prime is 31423897. The reversal of 31423877 is 77832413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31348801 + 75076 = 5599^2 + 274^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423877 - 2⁸ = 31423621 is a prime.

It is a super-2 number, since 2×31423877² = 1974920091422258, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31423807) 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, 15711938 + 15711939.

It is an arithmetic number, because the mean of its divisors is an integer number (15711939).

Almost surely, 2^31423877 is an apocalyptic number.

It is an amenable number.

31423877 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423877 is an equidigital number, since it uses as much as digits as its factorization.

31423877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 31423877 is about 5605.7004022691. The cubic root of 31423877 is about 315.5633724332.

The spelling of 31423877 in words is "thirty-one million, four hundred twenty-three thousand, eight hundred seventy-seven".