1352637491 has 2 divisors, whose sum is σ = 1352637492. Its totient is φ = 1352637490.

The previous prime is 1352637439. The next prime is 1352637499. The reversal of 1352637491 is 1947362531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1352637491 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1352637499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676318745 + 676318746.

It is an arithmetic number, because the mean of its divisors is an integer number (676318746).

Almost surely, 2^1352637491 is an apocalyptic number.

1352637491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1352637491 is an equidigital number, since it uses as much as digits as its factorization.

1352637491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 1352637491 is about 36778.2203348667. The cubic root of 1352637491 is about 1105.9287295193.

The spelling of 1352637491 in words is "one billion, three hundred fifty-two million, six hundred thirty-seven thousand, four hundred ninety-one".