69952561 has 4 divisors (see below), whose sum is σ = 79945792. Its totient is φ = 59959332.

The previous prime is 69952517. The next prime is 69952567. The reversal of 69952561 is 16525996.

69952561 = 1270² + 1271² + ... + 1311².

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 69952561 - 2²¹ = 67855409 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (69952567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4996605 + ... + 4996618.

It is an arithmetic number, because the mean of its divisors is an integer number (19986448).

Almost surely, 2^69952561 is an apocalyptic number.

It is an amenable number.

69952561 is a deficient number, since it is larger than the sum of its proper divisors (9993231).

69952561 is an equidigital number, since it uses as much as digits as its factorization.

69952561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9993230.

The product of its digits is 145800, while the sum is 43.

The square root of 69952561 is about 8363.7647623543. The cubic root of 69952561 is about 412.0354091068.

The spelling of 69952561 in words is "sixty-nine million, nine hundred fifty-two thousand, five hundred sixty-one".