145331442397 has 2 divisors, whose sum is σ = 145331442398. Its totient is φ = 145331442396.

The previous prime is 145331442371. The next prime is 145331442439. The reversal of 145331442397 is 793244133541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90300851001 + 55030591396 = 300501^2 + 234586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145331442397 is a prime.

It is a super-2 number, since 2×145331442397² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145331442317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72665721198 + 72665721199.

It is an arithmetic number, because the mean of its divisors is an integer number (72665721199).

Almost surely, 2^145331442397 is an apocalyptic number.

It is an amenable number.

145331442397 is a deficient number, since it is larger than the sum of its proper divisors (1).

145331442397 is an equidigital number, since it uses as much as digits as its factorization.

145331442397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 46.

The spelling of 145331442397 in words is "one hundred forty-five billion, three hundred thirty-one million, four hundred forty-two thousand, three hundred ninety-seven".