61540603 has 4 divisors (see below), whose sum is σ = 61597800. Its totient is φ = 61483408.

The previous prime is 61540553. The next prime is 61540607. The reversal of 61540603 is 30604516.

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 61540603 - 2¹³ = 61532411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61540607) 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, 26953 + ... + 29146.

It is an arithmetic number, because the mean of its divisors is an integer number (15399450).

Almost surely, 2^61540603 is an apocalyptic number.

61540603 is a deficient number, since it is larger than the sum of its proper divisors (57197).

61540603 is a wasteful number, since it uses less digits than its factorization.

61540603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57196.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 61540603 is about 7844.7818962671. The cubic root of 61540603 is about 394.8091862655.

The spelling of 61540603 in words is "sixty-one million, five hundred forty thousand, six hundred three".