61899541 has 4 divisors (see below), whose sum is σ = 67526784. Its totient is φ = 56272300.

The previous prime is 61899527. The next prime is 61899559. The reversal of 61899541 is 14599816.

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 not a de Polignac number, because 61899541 - 2²¹ = 59802389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61899571) 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, 2813605 + ... + 2813626.

It is an arithmetic number, because the mean of its divisors is an integer number (16881696).

Almost surely, 2^61899541 is an apocalyptic number.

It is an amenable number.

61899541 is a deficient number, since it is larger than the sum of its proper divisors (5627243).

61899541 is a wasteful number, since it uses less digits than its factorization.

61899541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5627242.

The product of its digits is 77760, while the sum is 43.

The square root of 61899541 is about 7867.6261349914. The cubic root of 61899541 is about 395.5752788312.

The spelling of 61899541 in words is "sixty-one million, eight hundred ninety-nine thousand, five hundred forty-one".