1652659991 has 2 divisors, whose sum is σ = 1652659992. Its totient is φ = 1652659990.

The previous prime is 1652659973. The next prime is 1652659993. The reversal of 1652659991 is 1999562561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1652659991 - 2¹⁰ = 1652658967 is a prime.

Together with 1652659993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1652659993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826329995 + 826329996.

It is an arithmetic number, because the mean of its divisors is an integer number (826329996).

Almost surely, 2^1652659991 is an apocalyptic number.

1652659991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1652659991 is an equidigital number, since it uses as much as digits as its factorization.

1652659991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1312200, while the sum is 53.

The square root of 1652659991 is about 40652.9210635595. The cubic root of 1652659991 is about 1182.3004035370.

The spelling of 1652659991 in words is "one billion, six hundred fifty-two million, six hundred fifty-nine thousand, nine hundred ninety-one".