31437149 has 4 divisors (see below), whose sum is σ = 31456320. Its totient is φ = 31417980.

The previous prime is 31437103. The next prime is 31437157. The reversal of 31437149 is 94173413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94173413 = 163 ⋅577751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31437149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31437649) 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 in 3 ways as a sum of consecutive naturals, for example, 6869 + ... + 10490.

It is an arithmetic number, because the mean of its divisors is an integer number (7864080).

Almost surely, 2^31437149 is an apocalyptic number.

It is an amenable number.

31437149 is a deficient number, since it is larger than the sum of its proper divisors (19171).

31437149 is a wasteful number, since it uses less digits than its factorization.

31437149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19170.

The product of its digits is 9072, while the sum is 32.

The square root of 31437149 is about 5606.8840722811. The cubic root of 31437149 is about 315.6077926638.

The spelling of 31437149 in words is "thirty-one million, four hundred thirty-seven thousand, one hundred forty-nine".