69148981 has 4 divisors (see below), whose sum is σ = 75435264. Its totient is φ = 62862700.

The previous prime is 69148973. The next prime is 69149011. The reversal of 69148981 is 18984196.

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 69148981 - 2³ = 69148973 is a prime.

It is a super-2 number, since 2×69148981² = 9563163146676722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69148901) 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, 3143125 + ... + 3143146.

It is an arithmetic number, because the mean of its divisors is an integer number (18858816).

Almost surely, 2^69148981 is an apocalyptic number.

It is an amenable number.

69148981 is a deficient number, since it is larger than the sum of its proper divisors (6286283).

69148981 is a wasteful number, since it uses less digits than its factorization.

69148981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6286282.

The product of its digits is 124416, while the sum is 46.

The square root of 69148981 is about 8315.5866299378. The cubic root of 69148981 is about 410.4515766102.

The spelling of 69148981 in words is "sixty-nine million, one hundred forty-eight thousand, nine hundred eighty-one".