1000061657 has 4 divisors (see below), whose sum is σ = 1142927616. Its totient is φ = 857195700.

The previous prime is 1000061653. The next prime is 1000061677. The reversal of 1000061657 is 7561600001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1000061657 - 2² = 1000061653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000061653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71432969 + ... + 71432982.

It is an arithmetic number, because the mean of its divisors is an integer number (285731904).

Almost surely, 2^1000061657 is an apocalyptic number.

It is an amenable number.

1000061657 is a deficient number, since it is larger than the sum of its proper divisors (142865959).

1000061657 is an equidigital number, since it uses as much as digits as its factorization.

1000061657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142865958.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 1000061657 is about 31623.7514694256. The cubic root of 1000061657 is about 1000.0205519109.

Adding to 1000061657 its reverse (7561600001), we get a palindrome (8561661658).

The spelling of 1000061657 in words is "one billion, sixty-one thousand, six hundred fifty-seven".