69998981 has 4 divisors (see below), whose sum is σ = 75383532. Its totient is φ = 64614432.

The previous prime is 69998941. The next prime is 69998993. The reversal of 69998981 is 18989996.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9796900 + 60202081 = 3130^2 + 7759^2 .

It is a cyclic number.

It is not a de Polignac number, because 69998981 - 2¹⁸ = 69736837 is a prime.

It is a super-2 number, since 2×69998981² = 9799714682076722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 69998981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69998941) 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, 2692256 + ... + 2692281.

It is an arithmetic number, because the mean of its divisors is an integer number (18845883).

Almost surely, 2^69998981 is an apocalyptic number.

It is an amenable number.

69998981 is a deficient number, since it is larger than the sum of its proper divisors (5384551).

69998981 is a wasteful number, since it uses less digits than its factorization.

69998981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5384550.

The product of its digits is 2519424, while the sum is 59.

The square root of 69998981 is about 8366.5393682215. The cubic root of 69998981 is about 412.1265301665.

The spelling of 69998981 in words is "sixty-nine million, nine hundred ninety-eight thousand, nine hundred eighty-one".