145388737 has 4 divisors (see below), whose sum is σ = 156572500. Its totient is φ = 134204976.

The previous prime is 145388731. The next prime is 145388821. The reversal of 145388737 is 737883541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 737883541 = 599 ⋅1231859.

It can be written as a sum of positive squares in 2 ways, for example, as 97002801 + 48385936 = 9849^2 + 6956^2 .

It is a cyclic number.

It is not a de Polignac number, because 145388737 - 2²⁷ = 11171009 is a prime.

It is a super-2 number, since 2×145388737² = 42275769692910338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145388731) 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, 5591862 + ... + 5591887.

It is an arithmetic number, because the mean of its divisors is an integer number (39143125).

Almost surely, 2^145388737 is an apocalyptic number.

It is an amenable number.

145388737 is a deficient number, since it is larger than the sum of its proper divisors (11183763).

145388737 is a wasteful number, since it uses less digits than its factorization.

145388737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11183762.

The product of its digits is 564480, while the sum is 46.

The square root of 145388737 is about 12057.7252000533. The cubic root of 145388737 is about 525.8278542922.

The spelling of 145388737 in words is "one hundred forty-five million, three hundred eighty-eight thousand, seven hundred thirty-seven".