145283777 has 4 divisors (see below), whose sum is σ = 145403220. Its totient is φ = 145164336.

The previous prime is 145283741. The next prime is 145283807. The reversal of 145283777 is 777382541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 136983616 + 8300161 = 11704^2 + 2881^2 .

It is a cyclic number.

It is not a de Polignac number, because 145283777 - 2⁸ = 145283521 is a prime.

It is a super-2 number, since 2×145283777² = 42214751718771458, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (145283737) 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, 57878 + ... + 60335.

It is an arithmetic number, because the mean of its divisors is an integer number (36350805).

Almost surely, 2^145283777 is an apocalyptic number.

It is an amenable number.

145283777 is a deficient number, since it is larger than the sum of its proper divisors (119443).

145283777 is a wasteful number, since it uses less digits than its factorization.

145283777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119442.

The product of its digits is 329280, while the sum is 44.

The square root of 145283777 is about 12053.3720178214. The cubic root of 145283777 is about 525.7012874542.

The spelling of 145283777 in words is "one hundred forty-five million, two hundred eighty-three thousand, seven hundred seventy-seven".