69139201 has 4 divisors (see below), whose sum is σ = 69158404. Its totient is φ = 69120000.

The previous prime is 69139177. The next prime is 69139211. The reversal of 69139201 is 10293196.

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 60466176 + 8673025 = 7776^2 + 2945^2 .

It is a 3-Lehmer number, since φ(69139201) divides (69139201-1)³.

It is a cyclic number.

It is not a de Polignac number, because 69139201 - 2¹³ = 69131009 is a prime.

It is a super-2 number, since 2×69139201² = 9560458229836802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69139211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2400 + ... + 12001.

It is an arithmetic number, because the mean of its divisors is an integer number (17289601).

Almost surely, 2^69139201 is an apocalyptic number.

69139201 is the 4801-st octagonal number.

It is an amenable number.

69139201 is a deficient number, since it is larger than the sum of its proper divisors (19203).

69139201 is a wasteful number, since it uses less digits than its factorization.

69139201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19202.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 69139201 is about 8314.9985568249. The cubic root of 69139201 is about 410.4322251287.

The spelling of 69139201 in words is "sixty-nine million, one hundred thirty-nine thousand, two hundred one".