31029969 has 4 divisors (see below), whose sum is σ = 41373296. Its totient is φ = 20686644.

The previous prime is 31029959. The next prime is 31029979. The reversal of 31029969 is 96992013.

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 an interprime number because it is at equal distance from previous prime (31029959) and next prime (31029979).

It is not a de Polignac number, because 31029969 - 2⁴ = 31029953 is a prime.

It is a super-2 number, since 2×31029969² = 1925717952281922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31029959) 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, 5171659 + ... + 5171664.

It is an arithmetic number, because the mean of its divisors is an integer number (10343324).

Almost surely, 2^31029969 is an apocalyptic number.

It is an amenable number.

31029969 is a deficient number, since it is larger than the sum of its proper divisors (10343327).

31029969 is a wasteful number, since it uses less digits than its factorization.

31029969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343326.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 31029969 is about 5570.4550083454. The cubic root of 31029969 is about 314.2392627826.

The spelling of 31029969 in words is "thirty-one million, twenty-nine thousand, nine hundred sixty-nine".