61293021 has 4 divisors (see below), whose sum is σ = 81724032. Its totient is φ = 40862012.

The previous prime is 61293013. The next prime is 61293047. The reversal of 61293021 is 12039216.

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 a cyclic number.

It is not a de Polignac number, because 61293021 - 2³ = 61293013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61292982 and 61293000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61293521) 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, 10215501 + ... + 10215506.

It is an arithmetic number, because the mean of its divisors is an integer number (20431008).

Almost surely, 2^61293021 is an apocalyptic number.

It is an amenable number.

61293021 is a deficient number, since it is larger than the sum of its proper divisors (20431011).

61293021 is a wasteful number, since it uses less digits than its factorization.

61293021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20431010.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 61293021 is about 7828.9859496617. The cubic root of 61293021 is about 394.2790266704.

The spelling of 61293021 in words is "sixty-one million, two hundred ninety-three thousand, twenty-one".