31377193 has 4 divisors (see below), whose sum is σ = 31493248. Its totient is φ = 31261140.

The previous prime is 31377179. The next prime is 31377197. The reversal of 31377193 is 39177313.

It is a happy number.

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 31377193 - 2⁵ = 31377161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31377197) 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, 57621 + ... + 58162.

It is an arithmetic number, because the mean of its divisors is an integer number (7873312).

Almost surely, 2^31377193 is an apocalyptic number.

It is an amenable number.

31377193 is a deficient number, since it is larger than the sum of its proper divisors (116055).

31377193 is a wasteful number, since it uses less digits than its factorization.

31377193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116054.

The product of its digits is 11907, while the sum is 34.

The square root of 31377193 is about 5601.5348789417. The cubic root of 31377193 is about 315.4070256975.

The spelling of 31377193 in words is "thirty-one million, three hundred seventy-seven thousand, one hundred ninety-three".