61019429 has 4 divisors (see below), whose sum is σ = 61139820. Its totient is φ = 60899040.

The previous prime is 61019417. The next prime is 61019461. The reversal of 61019429 is 92491016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51868804 + 9150625 = 7202^2 + 3025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61019429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61019395 and 61019404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61019479) 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, 59432 + ... + 60449.

It is an arithmetic number, because the mean of its divisors is an integer number (15284955).

Almost surely, 2^61019429 is an apocalyptic number.

It is an amenable number.

61019429 is a deficient number, since it is larger than the sum of its proper divisors (120391).

61019429 is a wasteful number, since it uses less digits than its factorization.

61019429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120390.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 61019429 is about 7811.4933911513. The cubic root of 61019429 is about 393.6915074278.

The spelling of 61019429 in words is "sixty-one million, nineteen thousand, four hundred twenty-nine".