3870989957 has 2 divisors, whose sum is σ = 3870989958. Its totient is φ = 3870989956.

The previous prime is 3870989951. The next prime is 3870990047. The reversal of 3870989957 is 7599890783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2707224961 + 1163764996 = 52031^2 + 34114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3870989957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3870989893 and 3870989902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3870989951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935494978 + 1935494979.

It is an arithmetic number, because the mean of its divisors is an integer number (1935494979).

Almost surely, 2^3870989957 is an apocalyptic number.

It is an amenable number.

3870989957 is a deficient number, since it is larger than the sum of its proper divisors (1).

3870989957 is an equidigital number, since it uses as much as digits as its factorization.

3870989957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34292160, while the sum is 65.

The square root of 3870989957 is about 62217.2802121726. The cubic root of 3870989957 is about 1570.1483296643.

The spelling of 3870989957 in words is "three billion, eight hundred seventy million, nine hundred eighty-nine thousand, nine hundred fifty-seven".