61019877 has 4 divisors (see below), whose sum is σ = 81359840. Its totient is φ = 40679916.

The previous prime is 61019869. The next prime is 61019891. The reversal of 61019877 is 77891016.

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 not a de Polignac number, because 61019877 - 2³ = 61019869 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 (61019867) 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, 10169977 + ... + 10169982.

It is an arithmetic number, because the mean of its divisors is an integer number (20339960).

Almost surely, 2^61019877 is an apocalyptic number.

It is an amenable number.

61019877 is a deficient number, since it is larger than the sum of its proper divisors (20339963).

61019877 is a wasteful number, since it uses less digits than its factorization.

61019877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20339962.

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 61019877 is about 7811.5220667934. The cubic root of 61019877 is about 393.6924709098.

The spelling of 61019877 in words is "sixty-one million, nineteen thousand, eight hundred seventy-seven".