61796021 has 4 divisors (see below), whose sum is σ = 70624032. Its totient is φ = 52968012.

The previous prime is 61796017. The next prime is 61796047. The reversal of 61796021 is 12069716.

It is a happy number.

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 61796021 - 2² = 61796017 is a prime.

It is a super-2 number, since 2×61796021² = 7637496422864882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61796221) 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, 4413995 + ... + 4414008.

It is an arithmetic number, because the mean of its divisors is an integer number (17656008).

Almost surely, 2^61796021 is an apocalyptic number.

It is an amenable number.

61796021 is a deficient number, since it is larger than the sum of its proper divisors (8828011).

61796021 is an equidigital number, since it uses as much as digits as its factorization.

61796021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8828010.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 61796021 is about 7861.0445234714. The cubic root of 61796021 is about 395.3546374420.

The spelling of 61796021 in words is "sixty-one million, seven hundred ninety-six thousand, twenty-one".