31854997 has 2 divisors, whose sum is σ = 31854998. Its totient is φ = 31854996.

The previous prime is 31854989. The next prime is 31855007. The reversal of 31854997 is 79945813.

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., 19280881 + 12574116 = 4391^2 + 3546^2 .

It is a cyclic number.

It is not a de Polignac number, because 31854997 - 2³ = 31854989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31854917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15927498 + 15927499.

It is an arithmetic number, because the mean of its divisors is an integer number (15927499).

Almost surely, 2^31854997 is an apocalyptic number.

It is an amenable number.

31854997 is a deficient number, since it is larger than the sum of its proper divisors (1).

31854997 is an equidigital number, since it uses as much as digits as its factorization.

31854997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 31854997 is about 5644.0231218520. The cubic root of 31854997 is about 316.9999469262. Note that the first 4 decimals are identical.

The spelling of 31854997 in words is "thirty-one million, eight hundred fifty-four thousand, nine hundred ninety-seven".