31404349 has 4 divisors (see below), whose sum is σ = 31472064. Its totient is φ = 31336636.

The previous prime is 31404341. The next prime is 31404377. The reversal of 31404349 is 94340413.

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.

It is a cyclic number.

It is not a de Polignac number, because 31404349 - 2³ = 31404341 is a prime.

It is a super-2 number, since 2×31404349² = 1972466272227602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31404341) 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, 33157 + ... + 34090.

It is an arithmetic number, because the mean of its divisors is an integer number (7868016).

Almost surely, 2^31404349 is an apocalyptic number.

It is an amenable number.

31404349 is a deficient number, since it is larger than the sum of its proper divisors (67715).

31404349 is an equidigital number, since it uses as much as digits as its factorization.

31404349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67714.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 31404349 is about 5603.9583331784. The cubic root of 31404349 is about 315.4979911683.

The spelling of 31404349 in words is "thirty-one million, four hundred four thousand, three hundred forty-nine".