148977643 has 4 divisors (see below), whose sum is σ = 149527648. Its totient is φ = 148427640.

The previous prime is 148977629. The next prime is 148977659. The reversal of 148977643 is 346779841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346779841 = 139 ⋅2494819.

It is a cyclic number.

It is not a de Polignac number, because 148977643 - 2¹³ = 148969451 is a prime.

It is a super-2 number, since 2×148977643² = 44388676227670898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148977623) 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, 274596 + ... + 275137.

It is an arithmetic number, because the mean of its divisors is an integer number (37381912).

Almost surely, 2^148977643 is an apocalyptic number.

148977643 is a deficient number, since it is larger than the sum of its proper divisors (550005).

148977643 is an equidigital number, since it uses as much as digits as its factorization.

148977643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550004.

The product of its digits is 1016064, while the sum is 49.

The square root of 148977643 is about 12205.6398029763. The cubic root of 148977643 is about 530.1194023138.

The spelling of 148977643 in words is "one hundred forty-eight million, nine hundred seventy-seven thousand, six hundred forty-three".