1692149561 has 4 divisors (see below), whose sum is σ = 1693222800. Its totient is φ = 1691076324.

The previous prime is 1692149551. The next prime is 1692149579. The reversal of 1692149561 is 1659412961.

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 a de Polignac number, because none of the positive numbers 2^k-1692149561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1692149551) 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, 534251 + ... + 537408.

It is an arithmetic number, because the mean of its divisors is an integer number (423305700).

Almost surely, 2^1692149561 is an apocalyptic number.

It is an amenable number.

1692149561 is a deficient number, since it is larger than the sum of its proper divisors (1073239).

1692149561 is a wasteful number, since it uses less digits than its factorization.

1692149561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073238.

The product of its digits is 116640, while the sum is 44.

The square root of 1692149561 is about 41135.7455384001. The cubic root of 1692149561 is about 1191.6432259678.

The spelling of 1692149561 in words is "one billion, six hundred ninety-two million, one hundred forty-nine thousand, five hundred sixty-one".