2861621039 has 2 divisors, whose sum is σ = 2861621040. Its totient is φ = 2861621038.

The previous prime is 2861621017. The next prime is 2861621047. The reversal of 2861621039 is 9301261682.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2861621039 - 2¹² = 2861616943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2861620993 and 2861621011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2861621069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1430810519 + 1430810520.

It is an arithmetic number, because the mean of its divisors is an integer number (1430810520).

Almost surely, 2^2861621039 is an apocalyptic number.

2861621039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2861621039 is an equidigital number, since it uses as much as digits as its factorization.

2861621039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2861621039 is about 53494.1215368567. The cubic root of 2861621039 is about 1419.7243793233.

The spelling of 2861621039 in words is "two billion, eight hundred sixty-one million, six hundred twenty-one thousand, thirty-nine".