61497587 has 4 divisors (see below), whose sum is σ = 62106576. Its totient is φ = 60888600.

The previous prime is 61497571. The next prime is 61497593. The reversal of 61497587 is 78579416.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61497587 - 2⁴ = 61497571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61497187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304343 + ... + 304544.

It is an arithmetic number, because the mean of its divisors is an integer number (15526644).

Almost surely, 2^61497587 is an apocalyptic number.

61497587 is a deficient number, since it is larger than the sum of its proper divisors (608989).

61497587 is a wasteful number, since it uses less digits than its factorization.

61497587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608988.

The product of its digits is 423360, while the sum is 47.

The square root of 61497587 is about 7842.0397219091. The cubic root of 61497587 is about 394.7171761689.

The spelling of 61497587 in words is "sixty-one million, four hundred ninety-seven thousand, five hundred eighty-seven".