69628993 has 4 divisors (see below), whose sum is σ = 79576000. Its totient is φ = 59681988.

The previous prime is 69628973. The next prime is 69629003. The reversal of 69628993 is 39982696.

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 a de Polignac number, because none of the positive numbers 2^k-69628993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69628993.

It is not an unprimeable number, because it can be changed into a prime (69628973) 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, 4973493 + ... + 4973506.

It is an arithmetic number, because the mean of its divisors is an integer number (19894000).

Almost surely, 2^69628993 is an apocalyptic number.

It is an amenable number.

69628993 is a deficient number, since it is larger than the sum of its proper divisors (9947007).

69628993 is an equidigital number, since it uses as much as digits as its factorization.

69628993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9947006.

The product of its digits is 1259712, while the sum is 52.

The square root of 69628993 is about 8344.3988998609. The cubic root of 69628993 is about 411.3991323584.

The spelling of 69628993 in words is "sixty-nine million, six hundred twenty-eight thousand, nine hundred ninety-three".