119428781 has 2 divisors, whose sum is σ = 119428782. Its totient is φ = 119428780.

The previous prime is 119428753. The next prime is 119428787. The reversal of 119428781 is 187824911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119006281 + 422500 = 10909^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 119428781 - 2¹⁰ = 119427757 is a prime.

It is a super-2 number, since 2×119428781² = 28526467462291922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (119428787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59714390 + 59714391.

It is an arithmetic number, because the mean of its divisors is an integer number (59714391).

Almost surely, 2^119428781 is an apocalyptic number.

It is an amenable number.

119428781 is a deficient number, since it is larger than the sum of its proper divisors (1).

119428781 is an equidigital number, since it uses as much as digits as its factorization.

119428781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 41.

The square root of 119428781 is about 10928.3475878103. The cubic root of 119428781 is about 492.4585324152.

The spelling of 119428781 in words is "one hundred nineteen million, four hundred twenty-eight thousand, seven hundred eighty-one".