31378097 has 2 divisors, whose sum is σ = 31378098. Its totient is φ = 31378096.

The previous prime is 31378091. The next prime is 31378103. The reversal of 31378097 is 79087313.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (31378091) and next prime (31378103).

It can be written as a sum of positive squares in only one way, i.e., 17172736 + 14205361 = 4144^2 + 3769^2 .

It is a cyclic number.

It is not a de Polignac number, because 31378097 - 2²⁰ = 30329521 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31378097.

It is not a weakly prime, because it can be changed into another prime (31378091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15689048 + 15689049.

It is an arithmetic number, because the mean of its divisors is an integer number (15689049).

Almost surely, 2^31378097 is an apocalyptic number.

It is an amenable number.

31378097 is a deficient number, since it is larger than the sum of its proper divisors (1).

31378097 is an equidigital number, since it uses as much as digits as its factorization.

31378097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 31378097 is about 5601.6155705296. The cubic root of 31378097 is about 315.4100547045.

The spelling of 31378097 in words is "thirty-one million, three hundred seventy-eight thousand, ninety-seven".