61177421 has 2 divisors, whose sum is σ = 61177422. Its totient is φ = 61177420.

The previous prime is 61177411. The next prime is 61177429. The reversal of 61177421 is 12477116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31866025 + 29311396 = 5645^2 + 5414^2 .

It is a cyclic number.

It is not a de Polignac number, because 61177421 - 2¹⁰ = 61176397 is a prime.

It is a super-2 number, since 2×61177421² = 7485353680422482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61177429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30588710 + 30588711.

It is an arithmetic number, because the mean of its divisors is an integer number (30588711).

Almost surely, 2^61177421 is an apocalyptic number.

It is an amenable number.

61177421 is a deficient number, since it is larger than the sum of its proper divisors (1).

61177421 is an equidigital number, since it uses as much as digits as its factorization.

61177421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 29.

The square root of 61177421 is about 7821.5996445740. The cubic root of 61177421 is about 394.0309976729.

The spelling of 61177421 in words is "sixty-one million, one hundred seventy-seven thousand, four hundred twenty-one".