290723897989 has 4 divisors (see below), whose sum is σ = 332255883424. Its totient is φ = 249191912556.

The previous prime is 290723897987. The next prime is 290723898011. The reversal of 290723897989 is 989798327092.

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 290723897989 - 2¹ = 290723897987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290723897983) 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, 20765992707 + ... + 20765992720.

It is an arithmetic number, because the mean of its divisors is an integer number (83063970856).

Almost surely, 2^290723897989 is an apocalyptic number.

It is an amenable number.

290723897989 is a deficient number, since it is larger than the sum of its proper divisors (41531985435).

290723897989 is an equidigital number, since it uses as much as digits as its factorization.

290723897989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41531985434.

The product of its (nonzero) digits is 246903552, while the sum is 73.

The spelling of 290723897989 in words is "two hundred ninety billion, seven hundred twenty-three million, eight hundred ninety-seven thousand, nine hundred eighty-nine".