31345669 has 2 divisors, whose sum is σ = 31345670. Its totient is φ = 31345668.

The previous prime is 31345627. The next prime is 31345679. The reversal of 31345669 is 96654313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30802500 + 543169 = 5550^2 + 737^2 .

It is a cyclic number.

It is not a de Polignac number, because 31345669 - 2⁹ = 31345157 is a prime.

It is a super-2 number, since 2×31345669² = 1965101930115122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31345609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672834 + 15672835.

It is an arithmetic number, because the mean of its divisors is an integer number (15672835).

Almost surely, 2^31345669 is an apocalyptic number.

It is an amenable number.

31345669 is a deficient number, since it is larger than the sum of its proper divisors (1).

31345669 is an equidigital number, since it uses as much as digits as its factorization.

31345669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 37.

The square root of 31345669 is about 5598.7203002115. The cubic root of 31345669 is about 315.3013627218.

The spelling of 31345669 in words is "thirty-one million, three hundred forty-five thousand, six hundred sixty-nine".