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61394661 = 326821629
BaseRepresentation
bin1110101000110…
…0111011100101
311021112011122100
43222030323211
5111204112121
610031522313
71343563116
oct352147345
9137464570
1061394661
1131723799
1218689399
13c947a03
14822220d
1555cb026
hex3a8cee5

61394661 has 6 divisors (see below), whose sum is σ = 88681190. Its totient is φ = 40929768.

The previous prime is 61394639. The next prime is 61394687. The reversal of 61394661 is 16649316.

It can be written as a sum of positive squares in only one way, i.e., 51753636 + 9641025 = 7194^2 + 3105^2 .

It is not a de Polignac number, because 61394661 - 211 = 61392613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61394611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3410806 + ... + 3410823.

Almost surely, 261394661 is an apocalyptic number.

It is an amenable number.

61394661 is a deficient number, since it is larger than the sum of its proper divisors (27286529).

61394661 is a wasteful number, since it uses less digits than its factorization.

61394661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6821635 (or 6821632 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 61394661 is about 7835.4745229629. The cubic root of 61394661 is about 394.4968458643.

The spelling of 61394661 in words is "sixty-one million, three hundred ninety-four thousand, six hundred sixty-one".

Divisors: 1 3 9 6821629 20464887 61394661