61899146 has 8 divisors (see below), whose sum is σ = 92942724. Its totient is φ = 30918240.

The previous prime is 61899143. The next prime is 61899151. The reversal of 61899146 is 64199816.

It can be written as a sum of positive squares in 2 ways, for example, as 57229225 + 4669921 = 7565^2 + 2161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 61899097 and 61899106.

It is not an unprimeable number, because it can be changed into a prime (61899143) 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, 13115 + ... + 17198.

Almost surely, 2^61899146 is an apocalyptic number.

61899146 is a deficient number, since it is larger than the sum of its proper divisors (31043578).

61899146 is a wasteful number, since it uses less digits than its factorization.

61899146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31336.

The product of its digits is 93312, while the sum is 44.

The square root of 61899146 is about 7867.6010320809. The cubic root of 61899146 is about 395.5744374003.

The spelling of 61899146 in words is "sixty-one million, eight hundred ninety-nine thousand, one hundred forty-six".