61507297 has 4 divisors (see below), whose sum is σ = 61762756. Its totient is φ = 61251840.

The previous prime is 61507291. The next prime is 61507319. The reversal of 61507297 is 79270516.

61507297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 32444416 + 29062881 = 5696^2 + 5391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61507297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61507291) 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, 127368 + ... + 127849.

It is an arithmetic number, because the mean of its divisors is an integer number (15440689).

Almost surely, 2^61507297 is an apocalyptic number.

It is an amenable number.

61507297 is a deficient number, since it is larger than the sum of its proper divisors (255459).

61507297 is a wasteful number, since it uses less digits than its factorization.

61507297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255458.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 61507297 is about 7842.6587966072. The cubic root of 61507297 is about 394.7379493530.

The spelling of 61507297 in words is "sixty-one million, five hundred seven thousand, two hundred ninety-seven".