149920454 has 4 divisors (see below), whose sum is σ = 224880684. Its totient is φ = 74960226.

The previous prime is 149920451. The next prime is 149920457. The reversal of 149920454 is 454029941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 454029941 = 41 ⋅11073901.

It is an interprime number because it is at equal distance from previous prime (149920451) and next prime (149920457).

It is a super-2 number, since 2×149920454² = 44952285055132232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149920451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37480112 + ... + 37480115.

It is an arithmetic number, because the mean of its divisors is an integer number (56220171).

Almost surely, 2^149920454 is an apocalyptic number.

149920454 is a deficient number, since it is larger than the sum of its proper divisors (74960230).

149920454 is an equidigital number, since it uses as much as digits as its factorization.

149920454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74960229.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 149920454 is about 12244.2008314140. The cubic root of 149920454 is about 531.2353454966.

The spelling of 149920454 in words is "one hundred forty-nine million, nine hundred twenty thousand, four hundred fifty-four".