919953397 has 4 divisors (see below), whose sum is σ = 1003585536. Its totient is φ = 836321260.

The previous prime is 919953389. The next prime is 919953407. The reversal of 919953397 is 793359919.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 919953397 - 2³ = 919953389 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 (919953197) 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, 41816053 + ... + 41816074.

It is an arithmetic number, because the mean of its divisors is an integer number (250896384).

Almost surely, 2^919953397 is an apocalyptic number.

It is an amenable number.

919953397 is a deficient number, since it is larger than the sum of its proper divisors (83632139).

919953397 is a wasteful number, since it uses less digits than its factorization.

919953397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83632138.

The product of its digits is 2066715, while the sum is 55.

The square root of 919953397 is about 30330.7335387722. The cubic root of 919953397 is about 972.5724036383.

The spelling of 919953397 in words is "nine hundred nineteen million, nine hundred fifty-three thousand, three hundred ninety-seven".