145997699 has 2 divisors, whose sum is σ = 145997700. Its totient is φ = 145997698.

The previous prime is 145997639. The next prime is 145997741. The reversal of 145997699 is 996799541.

It is a strong prime.

It is an emirp because it is prime and its reverse (996799541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145997699 - 2⁸ = 145997443 is a prime.

It is a super-2 number, since 2×145997699² = 42630656226589202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145997639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72998849 + 72998850.

It is an arithmetic number, because the mean of its divisors is an integer number (72998850).

Almost surely, 2^145997699 is an apocalyptic number.

145997699 is a deficient number, since it is larger than the sum of its proper divisors (1).

145997699 is an equidigital number, since it uses as much as digits as its factorization.

145997699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 59.

The square root of 145997699 is about 12082.9507571619. The cubic root of 145997699 is about 526.5609765397.

The spelling of 145997699 in words is "one hundred forty-five million, nine hundred ninety-seven thousand, six hundred ninety-nine".