61489019 has 16 divisors (see below), whose sum is σ = 65577600. Its totient is φ = 57558144.

The previous prime is 61489009. The next prime is 61489061. The reversal of 61489019 is 91098416.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61489019 is a prime.

It is a super-2 number, since 2×61489019² = 7561798915164722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61489009) 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, 268397 + ... + 268625.

It is an arithmetic number, because the mean of its divisors is an integer number (4098600).

Almost surely, 2^61489019 is an apocalyptic number.

61489019 is a deficient number, since it is larger than the sum of its proper divisors (4088581).

61489019 is a wasteful number, since it uses less digits than its factorization.

61489019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 61489019 is about 7841.4934164354. The cubic root of 61489019 is about 394.6988443178.

The spelling of 61489019 in words is "sixty-one million, four hundred eighty-nine thousand, nineteen".