19290961 has 4 divisors (see below), whose sum is σ = 19739632. Its totient is φ = 18842292.

The previous prime is 19290941. The next prime is 19290967. The reversal of 19290961 is 16909291.

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 19290961 - 2¹⁵ = 19258193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19290961.

It is not an unprimeable number, because it can be changed into a prime (19290967) 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, 224271 + ... + 224356.

It is an arithmetic number, because the mean of its divisors is an integer number (4934908).

Almost surely, 2^19290961 is an apocalyptic number.

It is an amenable number.

19290961 is a deficient number, since it is larger than the sum of its proper divisors (448671).

19290961 is an equidigital number, since it uses as much as digits as its factorization.

19290961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448670.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 19290961 is about 4392.1476523450. The cubic root of 19290961 is about 268.1953771352.

The spelling of 19290961 in words is "nineteen million, two hundred ninety thousand, nine hundred sixty-one".