61512697 has 4 divisors (see below), whose sum is σ = 61528720. Its totient is φ = 61496676.

The previous prime is 61512673. The next prime is 61512727. The reversal of 61512697 is 79621516.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61512697 - 2⁷ = 61512569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61512667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1558 + ... + 11200.

It is an arithmetic number, because the mean of its divisors is an integer number (15382180).

Almost surely, 2^61512697 is an apocalyptic number.

It is an amenable number.

61512697 is a deficient number, since it is larger than the sum of its proper divisors (16023).

61512697 is an equidigital number, since it uses as much as digits as its factorization.

61512697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16022.

The product of its digits is 22680, while the sum is 37.

The square root of 61512697 is about 7843.0030600530. The cubic root of 61512697 is about 394.7495009501.

The spelling of 61512697 in words is "sixty-one million, five hundred twelve thousand, six hundred ninety-seven".