69921413 has 4 divisors (see below), whose sum is σ = 70092780. Its totient is φ = 69750048.

The previous prime is 69921409. The next prime is 69921419. The reversal of 69921413 is 31412996.

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 29953729 + 39967684 = 5473^2 + 6322^2 .

It is a cyclic number.

It is not a de Polignac number, because 69921413 - 2² = 69921409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69921419) 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, 85070 + ... + 85887.

It is an arithmetic number, because the mean of its divisors is an integer number (17523195).

Almost surely, 2^69921413 is an apocalyptic number.

It is an amenable number.

69921413 is a deficient number, since it is larger than the sum of its proper divisors (171367).

69921413 is a wasteful number, since it uses less digits than its factorization.

69921413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171366.

The product of its digits is 11664, while the sum is 35.

The square root of 69921413 is about 8361.9024749156. The cubic root of 69921413 is about 411.9742439204.

The spelling of 69921413 in words is "sixty-nine million, nine hundred twenty-one thousand, four hundred thirteen".