69931997 has 4 divisors (see below), whose sum is σ = 69951840. Its totient is φ = 69912156.

The previous prime is 69931993. The next prime is 69932003. The reversal of 69931997 is 79913996.

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 69931997 - 2² = 69931993 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 (69931991) 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, 3047 + ... + 12212.

It is an arithmetic number, because the mean of its divisors is an integer number (17487960).

Almost surely, 2^69931997 is an apocalyptic number.

It is an amenable number.

69931997 is a deficient number, since it is larger than the sum of its proper divisors (19843).

69931997 is a wasteful number, since it uses less digits than its factorization.

69931997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19842.

The product of its digits is 826686, while the sum is 53.

The square root of 69931997 is about 8362.5353213006. The cubic root of 69931997 is about 411.9950297104.

The spelling of 69931997 in words is "sixty-nine million, nine hundred thirty-one thousand, nine hundred ninety-seven".