61306004 has 6 divisors (see below), whose sum is σ = 107285514. Its totient is φ = 30653000.

The previous prime is 61305991. The next prime is 61306009. The reversal of 61306004 is 40060316.

It can be written as a sum of positive squares in only one way, i.e., 44249104 + 17056900 = 6652^2 + 4130^2 .

It is a super-2 number, since 2×61306004² = 7516852252896032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61306009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7663247 + ... + 7663254.

It is an arithmetic number, because the mean of its divisors is an integer number (17880919).

Almost surely, 2^61306004 is an apocalyptic number.

It is an amenable number.

61306004 is a deficient number, since it is larger than the sum of its proper divisors (45979510).

61306004 is a wasteful number, since it uses less digits than its factorization.

61306004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15326505 (or 15326503 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 61306004 is about 7829.8150680588. The cubic root of 61306004 is about 394.3068632448.

The spelling of 61306004 in words is "sixty-one million, three hundred six thousand, four".