145233997 has 2 divisors, whose sum is σ = 145233998. Its totient is φ = 145233996.

The previous prime is 145233973. The next prime is 145234003. The reversal of 145233997 is 799332541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145226601 + 7396 = 12051^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 145233997 - 2¹⁵ = 145201229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145233097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72616998 + 72616999.

It is an arithmetic number, because the mean of its divisors is an integer number (72616999).

Almost surely, 2^145233997 is an apocalyptic number.

It is an amenable number.

145233997 is a deficient number, since it is larger than the sum of its proper divisors (1).

145233997 is an equidigital number, since it uses as much as digits as its factorization.

145233997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 145233997 is about 12051.3068585942. The cubic root of 145233997 is about 525.6412385391.

The spelling of 145233997 in words is "one hundred forty-five million, two hundred thirty-three thousand, nine hundred ninety-seven".