61490197 has 4 divisors (see below), whose sum is σ = 61510720. Its totient is φ = 61469676.

The previous prime is 61490153. The next prime is 61490227. The reversal of 61490197 is 79109416.

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 61490197 - 2²³ = 53101589 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 (61470197) 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, 4797 + ... + 12082.

It is an arithmetic number, because the mean of its divisors is an integer number (15377680).

Almost surely, 2^61490197 is an apocalyptic number.

It is an amenable number.

61490197 is a deficient number, since it is larger than the sum of its proper divisors (20523).

61490197 is a wasteful number, since it uses less digits than its factorization.

61490197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20522.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 61490197 is about 7841.5685293186. The cubic root of 61490197 is about 394.7013648343.

The spelling of 61490197 in words is "sixty-one million, four hundred ninety thousand, one hundred ninety-seven".