31142077 has 2 divisors, whose sum is σ = 31142078. Its totient is φ = 31142076.

The previous prime is 31142039. The next prime is 31142087. The reversal of 31142077 is 77024113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30404196 + 737881 = 5514^2 + 859^2 .

It is a cyclic number.

It is not a de Polignac number, because 31142077 - 2¹¹ = 31140029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31142087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571038 + 15571039.

It is an arithmetic number, because the mean of its divisors is an integer number (15571039).

Almost surely, 2^31142077 is an apocalyptic number.

It is an amenable number.

31142077 is a deficient number, since it is larger than the sum of its proper divisors (1).

31142077 is an equidigital number, since it uses as much as digits as its factorization.

31142077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 31142077 is about 5580.5086685714. The cubic root of 31142077 is about 314.6172456967.

The spelling of 31142077 in words is "thirty-one million, one hundred forty-two thousand, seventy-seven".