1013537691 has 24 divisors (see below), whose sum is σ = 1598134720. Its totient is φ = 640126152.

The previous prime is 1013537677. The next prime is 1013537731. The reversal of 1013537691 is 1967353101.

It is not a de Polignac number, because 1013537691 - 2¹¹ = 1013535643 is a prime.

It is a super-2 number, since 2×1013537691² = 2054517302155222962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1013537611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105145 + ... + 114378.

Almost surely, 2^1013537691 is an apocalyptic number.

1013537691 is a deficient number, since it is larger than the sum of its proper divisors (584597029).

1013537691 is an equidigital number, since it uses as much as digits as its factorization.

1013537691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219557 (or 219545 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 1013537691 is about 31836.1067186300. The cubic root of 1013537691 is about 1004.4923522178.

The spelling of 1013537691 in words is "one billion, thirteen million, five hundred thirty-seven thousand, six hundred ninety-one".