1948072691 has 8 divisors (see below), whose sum is σ = 1959388704. Its totient is φ = 1936782400.

The previous prime is 1948072657. The next prime is 1948072723. The reversal of 1948072691 is 1962708491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1948072691 - 2³⁰ = 874330867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1948072601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157370 + ... + 169296.

It is an arithmetic number, because the mean of its divisors is an integer number (244923588).

Almost surely, 2^1948072691 is an apocalyptic number.

1948072691 is a deficient number, since it is larger than the sum of its proper divisors (11316013).

1948072691 is a wasteful number, since it uses less digits than its factorization.

1948072691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12861.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 1948072691 is about 44136.9764596534. The cubic root of 1948072691 is about 1248.9212433751.

The spelling of 1948072691 in words is "one billion, nine hundred forty-eight million, seventy-two thousand, six hundred ninety-one".