31423049 has 4 divisors (see below), whose sum is σ = 35912064. Its totient is φ = 26934036.

The previous prime is 31423039. The next prime is 31423081. The reversal of 31423049 is 94032413.

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: 94032413 = 29 ⋅3242497.

It is a cyclic number.

It is not a de Polignac number, because 31423049 - 2⁴ = 31423033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31423039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2244497 + ... + 2244510.

It is an arithmetic number, because the mean of its divisors is an integer number (8978016).

Almost surely, 2^31423049 is an apocalyptic number.

It is an amenable number.

31423049 is a deficient number, since it is larger than the sum of its proper divisors (4489015).

31423049 is an equidigital number, since it uses as much as digits as its factorization.

31423049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489014.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 31423049 is about 5605.6265483887. The cubic root of 31423049 is about 315.5606007747.

The spelling of 31423049 in words is "thirty-one million, four hundred twenty-three thousand, forty-nine".