70523561 has 4 divisors (see below), whose sum is σ = 70540800. Its totient is φ = 70506324.

The previous prime is 70523539. The next prime is 70523617. The reversal of 70523561 is 16532507.

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 a de Polignac number, because none of the positive numbers 2^k-70523561 is a prime.

It is a super-2 number, since 2×70523561² = 9947145312241442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70523161) 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, 1400 + ... + 11958.

It is an arithmetic number, because the mean of its divisors is an integer number (17635200).

Almost surely, 2^70523561 is an apocalyptic number.

It is an amenable number.

70523561 is a deficient number, since it is larger than the sum of its proper divisors (17239).

70523561 is a wasteful number, since it uses less digits than its factorization.

70523561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17238.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 70523561 is about 8397.8307318021. The cubic root of 70523561 is about 413.1534761335.

The spelling of 70523561 in words is "seventy million, five hundred twenty-three thousand, five hundred sixty-one".