2154701389 has 2 divisors, whose sum is σ = 2154701390. Its totient is φ = 2154701388.

The previous prime is 2154701383. The next prime is 2154701453. The reversal of 2154701389 is 9831074512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1160560489 + 994140900 = 34067^2 + 31530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2154701389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154701383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077350694 + 1077350695.

It is an arithmetic number, because the mean of its divisors is an integer number (1077350695).

Almost surely, 2^2154701389 is an apocalyptic number.

It is an amenable number.

2154701389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154701389 is an equidigital number, since it uses as much as digits as its factorization.

2154701389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 2154701389 is about 46418.7611747664. The cubic root of 2154701389 is about 1291.6029567596.

The spelling of 2154701389 in words is "two billion, one hundred fifty-four million, seven hundred one thousand, three hundred eighty-nine".