61898037 has 16 divisors (see below), whose sum is σ = 91186560. Its totient is φ = 37148672.

The previous prime is 61898033. The next prime is 61898047. The reversal of 61898037 is 73089816.

It is not a de Polignac number, because 61898037 - 2² = 61898033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61898037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61898033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25212 + ... + 27557.

It is an arithmetic number, because the mean of its divisors is an integer number (5699160).

Almost surely, 2^61898037 is an apocalyptic number.

It is an amenable number.

61898037 is a deficient number, since it is larger than the sum of its proper divisors (29288523).

61898037 is a wasteful number, since it uses less digits than its factorization.

61898037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52812.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 61898037 is about 7867.5305528482. The cubic root of 61898037 is about 395.5720749839.

The spelling of 61898037 in words is "sixty-one million, eight hundred ninety-eight thousand, thirty-seven".