31454149 has 2 divisors, whose sum is σ = 31454150. Its totient is φ = 31454148.

The previous prime is 31454147. The next prime is 31454161. The reversal of 31454149 is 94145413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26853124 + 4601025 = 5182^2 + 2145^2 .

It is an emirp because it is prime and its reverse (94145413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31454149 - 2¹ = 31454147 is a prime.

Together with 31454147, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31454149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31454147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15727074 + 15727075.

It is an arithmetic number, because the mean of its divisors is an integer number (15727075).

Almost surely, 2^31454149 is an apocalyptic number.

It is an amenable number.

31454149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31454149 is an equidigital number, since it uses as much as digits as its factorization.

31454149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 31454149 is about 5608.3998609229. The cubic root of 31454149 is about 315.6646719273.

The spelling of 31454149 in words is "thirty-one million, four hundred fifty-four thousand, one hundred forty-nine".