8390061 has 28 divisors (see below), whose sum is σ = 13338972. Its totient is φ = 5256576.

The previous prime is 8390051. The next prime is 8390069. The reversal of 8390061 is 1600938.

8390061 = T₉₈₅ + T₉₈₆ + ... + T₁₀₀₁.

It can be written as a sum of positive squares in 2 ways, for example, as 7733961 + 656100 = 2781^2 + 810^2 .

It is not a de Polignac number, because 8390061 - 2⁵ = 8390029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

8390061 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8390069) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 12055 + ... + 12731.

Almost surely, 2^8390061 is an apocalyptic number.

8390061 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8390061 is a deficient number, since it is larger than the sum of its proper divisors (4948911).

8390061 is an equidigital number, since it uses as much as digits as its factorization.

8390061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 8390061 is about 2896.5602013423. The cubic root of 8390061 is about 203.1990654084.

Adding to 8390061 its reverse (1600938), we get a palindrome (9990999).

The spelling of 8390061 in words is "eight million, three hundred ninety thousand, sixty-one".