31454399 has 4 divisors (see below), whose sum is σ = 31614264. Its totient is φ = 31294536.

The previous prime is 31454389. The next prime is 31454431. The reversal of 31454399 is 99345413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99345413 = 137 ⋅725149.

It is a cyclic number.

It is not a de Polignac number, because 31454399 - 2⁴ = 31454383 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 (31454389) 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, 79637 + ... + 80030.

It is an arithmetic number, because the mean of its divisors is an integer number (7903566).

Almost surely, 2^31454399 is an apocalyptic number.

31454399 is a deficient number, since it is larger than the sum of its proper divisors (159865).

31454399 is a wasteful number, since it uses less digits than its factorization.

31454399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159864.

The product of its digits is 58320, while the sum is 38.

The square root of 31454399 is about 5608.4221488757. The cubic root of 31454399 is about 315.6655082342.

The spelling of 31454399 in words is "thirty-one million, four hundred fifty-four thousand, three hundred ninety-nine".