69921145 has 8 divisors (see below), whose sum is σ = 95891904. Its totient is φ = 47945904.

The previous prime is 69921073. The next prime is 69921149. The reversal of 69921145 is 54112996.

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 69921145 - 2⁹ = 69920633 is a prime.

It is a super-2 number, since 2×69921145² = 9777933036222050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69921149) 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, 998839 + ... + 998908.

It is an arithmetic number, because the mean of its divisors is an integer number (11986488).

Almost surely, 2^69921145 is an apocalyptic number.

It is an amenable number.

69921145 is a deficient number, since it is larger than the sum of its proper divisors (25970759).

69921145 is a wasteful number, since it uses less digits than its factorization.

69921145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997759.

The product of its digits is 19440, while the sum is 37.

The square root of 69921145 is about 8361.8864498389. The cubic root of 69921145 is about 411.9737175712.

The spelling of 69921145 in words is "sixty-nine million, nine hundred twenty-one thousand, one hundred forty-five".