61900169 has 4 divisors (see below), whose sum is σ = 62246160. Its totient is φ = 61554180.

The previous prime is 61900151. The next prime is 61900171. The reversal of 61900169 is 96100916.

It is a happy number.

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 61900169 - 2⁸ = 61899913 is a prime.

It is a super-2 number, since 2×61900169² = 7663261844457122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (61900109) 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, 172727 + ... + 173084.

It is an arithmetic number, because the mean of its divisors is an integer number (15561540).

Almost surely, 2^61900169 is an apocalyptic number.

It is an amenable number.

61900169 is a deficient number, since it is larger than the sum of its proper divisors (345991).

61900169 is a wasteful number, since it uses less digits than its factorization.

61900169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345990.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 61900169 is about 7867.6660452767. Note that the first 3 decimals coincide. The cubic root of 61900169 is about 395.5766165925.

The spelling of 61900169 in words is "sixty-one million, nine hundred thousand, one hundred sixty-nine".