69819997 has 8 divisors (see below), whose sum is σ = 75418616. Its totient is φ = 64253952.

The previous prime is 69819989. The next prime is 69820013. The reversal of 69819997 is 79991896.

It can be written as a sum of positive squares in 4 ways, for example, as 2268036 + 67551961 = 1506^2 + 8219^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 69819997 - 2³ = 69819989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69819797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3588 + ... + 12349.

It is an arithmetic number, because the mean of its divisors is an integer number (9427327).

Almost surely, 2^69819997 is an apocalyptic number.

It is an amenable number.

69819997 is a deficient number, since it is larger than the sum of its proper divisors (5598619).

69819997 is a wasteful number, since it uses less digits than its factorization.

69819997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16287.

The product of its digits is 2204496, while the sum is 58.

The square root of 69819997 is about 8355.8361041849. The cubic root of 69819997 is about 411.7749678359.

The spelling of 69819997 in words is "sixty-nine million, eight hundred nineteen thousand, nine hundred ninety-seven".