61292811 has 4 divisors (see below), whose sum is σ = 81723752. Its totient is φ = 40861872.

The previous prime is 61292801. The next prime is 61292821. The reversal of 61292811 is 11829216.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (61292801) and next prime (61292821).

It is not a de Polignac number, because 61292811 - 2¹⁷ = 61161739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61292801) 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, 10215466 + ... + 10215471.

It is an arithmetic number, because the mean of its divisors is an integer number (20430938).

Almost surely, 2^61292811 is an apocalyptic number.

61292811 is a deficient number, since it is larger than the sum of its proper divisors (20430941).

61292811 is a wasteful number, since it uses less digits than its factorization.

61292811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20430940.

The product of its digits is 1728, while the sum is 30.

The square root of 61292811 is about 7828.9725379516. The cubic root of 61292811 is about 394.2785763816.

The spelling of 61292811 in words is "sixty-one million, two hundred ninety-two thousand, eight hundred eleven".