145933969 has 2 divisors, whose sum is σ = 145933970. Its totient is φ = 145933968.

The previous prime is 145933943. The next prime is 145933979. The reversal of 145933969 is 969339541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145926400 + 7569 = 12080^2 + 87^2 .

It is a cyclic number.

It is not a de Polignac number, because 145933969 - 2⁵ = 145933937 is a prime.

It is a super-2 number, since 2×145933969² = 42593446616185922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145933939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72966984 + 72966985.

It is an arithmetic number, because the mean of its divisors is an integer number (72966985).

Almost surely, 2^145933969 is an apocalyptic number.

It is an amenable number.

145933969 is a deficient number, since it is larger than the sum of its proper divisors (1).

145933969 is an equidigital number, since it uses as much as digits as its factorization.

145933969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 49.

The square root of 145933969 is about 12080.3132823615. The cubic root of 145933969 is about 526.4843483570.

The spelling of 145933969 in words is "one hundred forty-five million, nine hundred thirty-three thousand, nine hundred sixty-nine".