148500391 has 4 divisors (see below), whose sum is σ = 159923512. Its totient is φ = 137077272.

The previous prime is 148500379. The next prime is 148500427. The reversal of 148500391 is 193005841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193005841 = 7 ⋅27572263.

It is a cyclic number.

It is not a de Polignac number, because 148500391 - 2¹³ = 148492199 is a prime.

It is a super-2 number, since 2×148500391² = 44104732254305762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148500691) 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, 5711541 + ... + 5711566.

It is an arithmetic number, because the mean of its divisors is an integer number (39980878).

Almost surely, 2^148500391 is an apocalyptic number.

148500391 is a deficient number, since it is larger than the sum of its proper divisors (11423121).

148500391 is a wasteful number, since it uses less digits than its factorization.

148500391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11423120.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 148500391 is about 12186.0736498677. The cubic root of 148500391 is about 529.5527150683.

The spelling of 148500391 in words is "one hundred forty-eight million, five hundred thousand, three hundred ninety-one".