946155391 has 4 divisors (see below), whose sum is σ = 947818800. Its totient is φ = 944491984.

The previous prime is 946155377. The next prime is 946155467. The reversal of 946155391 is 193551649.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193551649 = 151 ⋅1281799.

It is a cyclic number.

It is not a de Polignac number, because 946155391 - 2⁹ = 946154879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (946155361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830851 + ... + 831988.

It is an arithmetic number, because the mean of its divisors is an integer number (236954700).

Almost surely, 2^946155391 is an apocalyptic number.

946155391 is a deficient number, since it is larger than the sum of its proper divisors (1663409).

946155391 is a wasteful number, since it uses less digits than its factorization.

946155391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663408.

The product of its digits is 145800, while the sum is 43.

The square root of 946155391 is about 30759.6389933302. The cubic root of 946155391 is about 981.7196625126.

The spelling of 946155391 in words is "nine hundred forty-six million, one hundred fifty-five thousand, three hundred ninety-one".